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Theses

Etude du dépôt de micro particules par thermophorèse pour un écoulement laminaire entre deux plaques planes parallèles

Abstract : This work is an experimental and theoretical contribution to the study of the deposits of microparticles by thermophoresis for a laminar flow between two parallel flat plates. After a theoretical approach of the phenomenon, we study in experiments the deposit of microparticles of sodium chloride generated by pulverization in air circulates between two flat plates separated by 0,005 m. The thermal gradient between the two plates is 26000 K.m[exponent -1]. The air flow rate is chooses so that the flow is laminar. We propose three models (two analytical models and a numerical model) to estimate the thermophoretic efficiency of the particles deposit. With our operating conditions, the experimental efficiency is low, the values are compatible with the values estimated by the numerical model which represents better the thermohydraulics of the gas phase in the deposit zone.
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Theses
File URL :
http://docnum.univ-lorraine.fr/prive/SCD_T_2002_0007_ASSAF.pdf
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https://hal.univ-lorraine.fr/tel-01746612
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Submitted on : Thursday, March 29, 2018 - 10:41:16 AM
Last modification on : Wednesday, October 7, 2020 - 3:46:39 PM

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  • HAL Id : tel-01746612, version 1

Citation

Bassam Assaf. Etude du dépôt de micro particules par thermophorèse pour un écoulement laminaire entre deux plaques planes parallèles. Autre. Université Henri Poincaré - Nancy 1, 2002. Français. ⟨NNT : 2002NAN10007⟩. ⟨tel-01746612⟩

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