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Contribution à l'étude du comportement de particules solides en écoulement turbulent confiné par simulation numérique directe

Abstract : The behavior of solid particles in a turbulent gas channel flow is studied by direct numerical simulation. A mixed Eulerian and Lagrangian formulation allowed us to deal with the dispersion of small solid particles through the computation of the integral time scales of the turbulence seen by the solid particles on their trajectories. Those integral times are compared with the ones estimated thank to a semi-empirical correlation established with direct numerical simulation in isotropic and homogeneous turbulence. The comparison shows the impossibility to use this correlation to predict the streamwise dispersion. Beside this dispersion study, the turbulence modulation due to solid particles is shown. The forces taken into account on the particles in all the simulation are at least the non-linear drag and the Saffman's lift both corrected for near wall effect and using a fully three-dimensional Hermitian interpolation.
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http://docnum.univ-lorraine.fr/prive/SCD_T_2001_0204_RAMBAUD.pdf
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https://hal.univ-lorraine.fr/tel-01746508
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Submitted on : Thursday, March 29, 2018 - 10:39:21 AM
Last modification on : Monday, March 29, 2021 - 4:03:09 PM

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Patrick Rambaud. Contribution à l'étude du comportement de particules solides en écoulement turbulent confiné par simulation numérique directe. Autre. Université Henri Poincaré - Nancy 1, 2001. Français. ⟨NNT : 2001NAN10204⟩. ⟨tel-01746508⟩

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