Simultaneous Particle Image Velocimetry of fluid flow and solid by t0231232

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									 Simultaneous Particle Image Velocimetry of fluid flow
    and solid particles inside a decaying turbulence.

                      J.M. Lenoir1 , J.N. Gence1 , S. Simoëns1
                        M. Belmahdi2 , F. Alleg2 , R. Zegadi2

               1 LMFA,   UMR CNRS 5509 , EC-Lyon, Université de Lyon, France
2 Optical   and precision Mechanical Departement, Ferhat Abbas University of Setif, Algeria


                   Symposium ISFV13/FLUVISU12 Nice 2008




J.M. Lenoir et al (LMFA)       Solid particles inside a decaying turbulence   July 2008   1 / 22
                                         Outline




1 Introduction
     Context
     Goal
     Experiment

2 Technic
     PIV

3 Results
     Spectra
     PDF
     Decay

4 Conclusion
     Conclusion


  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   2 / 22
                                    Introduction


Outline

1 Introduction
     Context
     Goal
     Experiment

2 Technic
     PIV

3 Results
     Spectra
     PDF
     Decay

4 Conclusion
     Conclusion

  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   3 / 22
                                    Introduction    Context




Applications

  1   Desertification : transport of sand particles.
  2   Chemical engineering.
  3   Atmospheric pollution.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   4 / 22
                                    Introduction    Context




Applications

  1   Desertification : transport of sand particles.
  2   Chemical engineering.
  3   Atmospheric pollution.


Research on turbulent mixing

      Characteristic scales for stochastic models.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   4 / 22
                                    Introduction    Goal




Goal

 1     Calibrate the experiment.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   5 / 22
                                    Introduction    Goal




Goal

 1     Calibrate the experiment.
 2     Understand the influence of solid particles on turbulence.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   5 / 22
                                    Introduction    Goal




Goal

 1     Calibrate the experiment.
 2     Understand the influence of solid particles on turbulence.
 3     Determine lagrangian time scales.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   5 / 22
                                    Introduction    Experiment


Water channel




                                                            Grid-generated turbulence
                                                            (Solidity=0.44).




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence     July 2008   6 / 22
                                    Introduction    Experiment


Water channel




                                                            Grid-generated turbulence
                                                            (Solidity=0.44).
                                                            4m long.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence     July 2008   6 / 22
                                    Introduction    Experiment


Water channel




                                                            Grid-generated turbulence
                                                            (Solidity=0.44).
                                                            4m long.
                                                            20×20 cm2 cross section.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence     July 2008   6 / 22
                                    Introduction    Experiment


Water channel




                                                            Grid-generated turbulence
                                                            (Solidity=0.44).
                                                            4m long.
                                                            20×20 cm2 cross section.
                                                            2 m/s ⇒ Reλ = 35.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence     July 2008   6 / 22
                                    Introduction    Experiment


Water channel




                                                            Grid-generated turbulence
                                                            (Solidity=0.44).
                                                            4m long.
                                                            20×20 cm2 cross section.
                                                            2 m/s ⇒ Reλ = 35.
                                                            Transparent ⇒ Optical access.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence     July 2008   6 / 22
                                    Introduction    Experiment


Water channel




                                                            Grid-generated turbulence
                                                            (Solidity=0.44).
                                                            4m long.
                                                            20×20 cm2 cross section.
                                                            2 m/s ⇒ Reλ = 35.
                                                            Transparent ⇒ Optical access.
                                                            Water tank.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence     July 2008   6 / 22
                                        Technic


Outline

1 Introduction
     Context
     Goal
     Experiment

2 Technic
     PIV

3 Results
     Spectra
     PDF
     Decay

4 Conclusion
     Conclusion

  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   7 / 22
                                        Technic     PIV


Tracer

     Fluorescent particles 10 µm diameter ([Nogueira et al, 2003]).


Solid Particles




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   8 / 22
                                        Technic     PIV


Tracer

     Fluorescent particles 10 µm diameter ([Nogueira et al, 2003]).


Solid Particles

     Density
                                    ∼ 1.025 that of water




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   8 / 22
                                        Technic     PIV


Tracer

     Fluorescent particles 10 µm diameter ([Nogueira et al, 2003]).


Solid Particles

     Density
                                    ∼ 1.025 that of water
     Mass load
                                                ∼ 0.2%




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   8 / 22
                                        Technic     PIV


Tracer

     Fluorescent particles 10 µm diameter ([Nogueira et al, 2003]).


Solid Particles

     Density
                                    ∼ 1.025 that of water
     Mass load
                                                ∼ 0.2%
     Stokes number
                                                  ∼ 0.2




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   8 / 22
                                        Technic     PIV


Tracer

     Fluorescent particles 10 µm diameter ([Nogueira et al, 2003]).


Solid Particles

     Density
                                    ∼ 1.025 that of water
     Mass load
                                                ∼ 0.2%
     Stokes number
                                                  ∼ 0.2
     Diameter
                                           170 ⇒ 250µm



  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   8 / 22
                                         Technic     PIV


PIV


Separation of the 2 phases
Dichroic band-pass filter on the
camera.

    Pulsed YAG laser synchronized
    with cameras.
    Choice of the scales : 3L → 3η.
    Time between two laser pulses
    (200µs ⇒ 15 pix).
    Treatment using Lavision.



   J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   9 / 22
                                         Technic     PIV


PIV


Separation of the 2 phases
Dichroic band-pass filter on one
camera.

    Pulsed YAG laser synchronized
    with cameras.
    Choice of the scales : 3L → 3η.                                              CLICK
                                                                                         CLICK



    Time between two laser pulses
    (200µs ⇒ 15 pix).
    Treatment using Lavision.



   J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008     10 / 22
                                         Technic     PIV


PIV


Separation of the 2 phases
Dichroic band-pass filter on one
camera.

    Pulsed YAG laser synchronized
    with cameras.
    Choice of the scales : 3L → 3η.
    Time between two laser pulses
    (200µs ⇒ 15 pix).
    Treatment using Lavision.



   J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   11 / 22
                                         Technic     PIV


PIV


Separation of the 2 phases
Dichroic band-pass filter on one
camera.

    Pulsed YAG laser synchronized
    with cameras.
    Choice of the scales : 3L → 3η.                                              CLICK
                                                                                         CLICK



    Time between two laser pulses
    (200µs ⇒ 15 pix).
    Treatment using Lavision.



   J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008     12 / 22
                                         Technic     PIV


PIV


Separation of the 2 phases
Dichroic band-pass filter on one
camera.

    Pulsed YAG laser synchronized
    with cameras.
    Choice of the scales : 3L → 3η.
    Time between two laser pulses
    (200µs ⇒ 15 pix).
    Treatment using Lavision.



   J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   13 / 22
                                         Results


Outline

1 Introduction
     Context
     Goal
     Experiment

2 Technic
     PIV

3 Results
     Spectra
     PDF
     Decay

4 Conclusion
     Conclusion

  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   14 / 22
                                                          Results            Spectra


Eulerian Spectra for loaded and unloaded fluid



       0
                                                                                   High spatial resolution : camera
  10
                                                                                   3580×2350pixels.


  10-1




                           flow without solid particles
                           -5/3 law
  10-2                     flow with solid particles




                      -2                         -1                      0
                 10                         10                      10




  J.M. Lenoir et al (LMFA)                Solid particles inside a decaying turbulence               July 2008   15 / 22
                                                          Results            Spectra


Eulerian Spectra for loaded and unloaded fluid



       0
                                                                                   High spatial resolution : camera
  10
                                                                                   3580×2350pixels.
                                                                                   PIV analysis : 8×8pixels ≈ ηk .
  10-1




                           flow without solid particles
                           -5/3 law
  10-2                     flow with solid particles




                      -2                         -1                      0
                 10                         10                      10




  J.M. Lenoir et al (LMFA)                Solid particles inside a decaying turbulence                July 2008   15 / 22
                                                          Results            Spectra


Eulerian Spectra for loaded and unloaded fluid



       0
                                                                                   High spatial resolution : camera
  10
                                                                                   3580×2350pixels.
                                                                                   PIV analysis : 8×8pixels ≈ ηk .
  10-1                                                                             10 turbulent integral scales.

                           flow without solid particles
                           -5/3 law
  10-2                     flow with solid particles




                      -2                         -1                      0
                 10                         10                      10




  J.M. Lenoir et al (LMFA)                Solid particles inside a decaying turbulence                July 2008    15 / 22
                                                          Results            Spectra


Eulerian Spectra for loaded and unloaded fluid



       0
                                                                                   High spatial resolution : camera
  10
                                                                                   3580×2350pixels.
                                                                                   PIV analysis : 8×8pixels ≈ ηk .
  10-1                                                                             10 turbulent integral scales.
                                                                                   Spectrum exhibits a small
                           flow without solid particles                            inertial range with
                           -5/3 law
  10-2                     flow with solid particles

                                                                                                 k −5/3

                 10
                      -2
                                            10
                                                 -1
                                                                    10
                                                                         0         .



  J.M. Lenoir et al (LMFA)                Solid particles inside a decaying turbulence                July 2008    15 / 22
                                                       Results   PDF


PDF of velocity for loaded and unloaded fluid


       0
  10




  10-1
                                                                        Pdf close to a gaussian for
                                                                        unloaded case.

  10-2




                        flow without solid particles
                        flow with solid particles
       -3               Gaussian fit
  10


            -5                  0                          5




  J.M. Lenoir et al (LMFA)               Solid particles inside a decaying turbulence      July 2008   16 / 22
                                                       Results   PDF


PDF of velocity for loaded and unloaded fluid


       0
  10




  10-1
                                                                        Pdf close to a gaussian for
                                                                        unloaded case.
                                                                        Same behavior for loaded case.
  10-2




                        flow without solid particles
                        flow with solid particles
       -3               Gaussian fit
  10


            -5                  0                          5




  J.M. Lenoir et al (LMFA)               Solid particles inside a decaying turbulence      July 2008   16 / 22
                                                       Results   PDF


PDF of velocity for loaded and unloaded fluid


       0
  10




  10-1
                                                                        Pdf close to a gaussian for
                                                                        unloaded case.
                                                                        Same behavior for loaded case.
  10-2                                                                  Use of more statistics and
                                                                        analysis with
                        flow without solid particles                    3rd and 4th moments.
                        flow with solid particles
       -3               Gaussian fit
  10


            -5                  0                          5




  J.M. Lenoir et al (LMFA)               Solid particles inside a decaying turbulence      July 2008   16 / 22
                                                                  Results     Decay


Decay of turbulence for loaded and unloaded fluid


                -1
                                                                                      Turbulence with solid particles is
           10
                                                                                      higher.
                                   fluide (with solid particles) 2m/s
                                   fluide (without solid particles) 2m/s
                                   -1.28 law
           10
                -2                 -1.0 law
 (u’/U)2




           10-3




           10-4




                -5
           10
                 30    40     50         60      70     80    90 100 110120
                                         x/M




           J.M. Lenoir et al (LMFA)              Solid particles inside a decaying turbulence            July 2008   17 / 22
                                                                  Results     Decay


Decay of turbulence for loaded and unloaded fluid


                -1
                                                                                      Turbulence with solid particles is
           10
                                                                                      higher.
                                   fluide (with solid particles) 2m/s
                                                                                                             ′
                                   fluide (without solid particles) 2m/s                                    u
                                   -1.28 law                                          Anisotropy factor ∼   v′
                                                                                                                 = 1.1.
           10
                -2                 -1.0 law
 (u’/U)2




           10-3




           10-4




                -5
           10
                 30    40     50         60      70     80    90 100 110120
                                         x/M




           J.M. Lenoir et al (LMFA)              Solid particles inside a decaying turbulence            July 2008   17 / 22
                                                                  Results     Decay


Decay of turbulence for loaded and unloaded fluid


                -1
                                                                                      Turbulence with solid particles is
           10
                                                                                      higher.
                                   fluide (with solid particles) 2m/s
                                                                                                              ′
                                   fluide (without solid particles) 2m/s                                     u
                                   -1.28 law                                          Anisotropy factor ∼    v′
                                                                                                                  = 1.1.
           10
                -2                 -1.0 law
                                                                                      Decay without solid particles :

                                                                                                a−1.28 power law
 (u’/U)2




           10-3




           10-4




                -5
           10
                 30    40     50         60      70     80    90 100 110120
                                         x/M




           J.M. Lenoir et al (LMFA)              Solid particles inside a decaying turbulence             July 2008   17 / 22
                                                                  Results     Decay


Decay of turbulence for loaded and unloaded fluid


                -1
                                                                                      Turbulence with solid particles is
           10
                                                                                      higher.
                                   fluide (with solid particles) 2m/s
                                                                                                              ′
                                   fluide (without solid particles) 2m/s                                     u
                                   -1.28 law                                          Anisotropy factor ∼    v′
                                                                                                                  = 1.1.
           10
                -2                 -1.0 law
                                                                                      Decay without solid particles :

                                                                                                a−1.28 power law
 (u’/U)2




           10-3



                                                                                      Decay with solid particles :
           10-4

                                                                                                a−1.00 power law
                -5
           10
                 30    40     50         60      70     80    90 100 110120
                                         x/M




           J.M. Lenoir et al (LMFA)              Solid particles inside a decaying turbulence             July 2008   17 / 22
                                                                  Results     Decay


Decay of turbulence for loaded and unloaded fluid


                -1
                                                                                      Turbulence with solid particles is
           10
                                                                                      higher.
                                   fluide (with solid particles) 2m/s
                                                                                                              ′
                                   fluide (without solid particles) 2m/s                                     u
                                   -1.28 law                                          Anisotropy factor ∼    v′
                                                                                                                  = 1.1.
           10
                -2                 -1.0 law
                                                                                      Decay without solid particles :

                                                                                                a−1.28 power law
 (u’/U)2




           10-3



                                                                                      Decay with solid particles :
           10-4

                                                                                                a−1.00 power law
                -5
           10
                 30    40     50         60
                                         x/M
                                                 70     80    90 100 110120           Solid particles seem to maintain
                                                                                      turbulence.


           J.M. Lenoir et al (LMFA)              Solid particles inside a decaying turbulence             July 2008   17 / 22
                                     Conclusion


Outline

1 Introduction
     Context
     Goal
     Experiment

2 Technic
     PIV

3 Results
     Spectra
     PDF
     Decay

4 Conclusion
     Conclusion

  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   18 / 22
                                     Conclusion     Conclusion




Summary

     Pdf of velocity has a gaussian shape in both cases.




Coming next




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   19 / 22
                                     Conclusion     Conclusion




Summary

     Pdf of velocity has a gaussian shape in both cases.
     Eulerian spatial power spectrum behavior is not modified by solid
     particles.



Coming next




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   19 / 22
                                     Conclusion     Conclusion




Summary

     Pdf of velocity has a gaussian shape in both cases.
     Eulerian spatial power spectrum behavior is not modified by solid
     particles.
     The turbulence decay is largely modified.


Coming next




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   19 / 22
                                     Conclusion     Conclusion




Summary

     Pdf of velocity has a gaussian shape in both cases.
     Eulerian spatial power spectrum behavior is not modified by solid
     particles.
     The turbulence decay is largely modified.


Coming next

     Lagrangian characteristic times.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   19 / 22
                                     Conclusion     Conclusion




Summary

     Pdf of velocity has a gaussian shape in both cases.
     Eulerian spatial power spectrum behavior is not modified by solid
     particles.
     The turbulence decay is largely modified.


Coming next

     Lagrangian characteristic times.
     3D tracking.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   19 / 22
                                     Conclusion     Conclusion




Summary

     Pdf of velocity has a gaussian shape in both cases.
     Eulerian spatial power spectrum behavior is not modified by solid
     particles.
     The turbulence decay is largely modified.


Coming next

     Lagrangian characteristic times.
     3D tracking.
     Higher turbulence.




  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   19 / 22
                                    Conclusion     Conclusion




                           Thank you for your attention.




J.M. Lenoir et al (LMFA)    Solid particles inside a decaying turbulence   July 2008   20 / 22
                                     References


References I

    G. Comte-Bellot and S. Corrsin.
    The use of a contraction to improve the isotropy of grid generated
    turbulence.
    Journal of Fluid Mechanics, 25(4) :657682, 1966.
    G. Comte-Bellot and S. Corrsin.
    Simple eulerian time correlation of full and narrow-band signals in
    grid-generated, isotropic turbulence.
    Journal of Fluid Mechanics, 48(2) :273337, 1971.
    W.H. Snyder and J.L. Lumley.
    Some measurements of particle velocity autocorrelation functions in a
    turbulent flow.
    Journal of Fluid Mechanics, 48, p41, 1971.


  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   21 / 22
                                     References


References II

    D.J. Schlien and S. Corrsin.
    A measurement of lagrangian velocity autocorrelation in approximately
    isotropic turbulence.
    Journal of Fluid Mechanics, 62(2), 255-270, 1974.
     Poelma and Ooms and Westerweel.
    Particle-fluid interaction in grid-generated turbulence.
    Journal of Fluid Mechanics, 589, 315-350, 2007.
    S. Nogueira and R.G. Sousa and A.M.F.R. Pinto and M.L.
    Riethmuller and J.B.L.M. Campos.
    Simultaneous PIV and pulsed shadow technique in slug flow : a
    solution for optical problems.
    Experiments in Fluids, 35, 598-609, 2003.


  J.M. Lenoir et al (LMFA)   Solid particles inside a decaying turbulence   July 2008   22 / 22

								
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