This chapter presents a study on photophoresis of a
microparticle in gaseous media with focus on the effect of thermal stress slip,
which is deemed as one of factors causing deviations of previous theoretical
predictions from measurements. The present modified theory exhibits an
effective agreement with the measurements and highlights the importance of the
thermal stress slip in photophoresis of a particle, particularly one with a
small radius when combined with an analysis of one order of magnitude. A
schematic diagram of an isotropic homogenous particle suspended in a gas medium
with a monochromatic, parallel, and linearly polarized light beam along the z
direction has introduced in this chapter. The theoretical expressions combined
with an order-of magnitude analysis demonstrate the significance of the thermal
stress slip in micro-particle photophoresis and disclosed the reason for
deviation of the previous theory at small particle size. Parametric analysis
revealed that the influence of thermal stress becomes more pronounced with a
reducing particle thermal conductivity and/or increasing Knudsen number.
Author(s) Details:
Chyi-Yeou Soong,
Department of Aerospace and Systems Engineering, Feng Chia University, Seatwen, Taichung-40724, Taiwan, ROC.
Wen-Ken Li,
Department of Mechanical Engineering, Chung Yuan Christian University, Zhongli, Taoyuan-320314, Taiwan, ROC.
Chung-Ho Liu,
Department of Biomedical Engineering, Yuanpei University, Hsinchu-30015, Taiwan, ROC.
Pei-Yuan Tzeng,
Department of Mechanical and Aerospace Engineering, Chung-Cheng Institute of Technology, National Defense University, Taoyuan-33509, Taiwan, ROC.
Please see the link here: https://stm.bookpi.org/CPPSR-V6/article/view/13247
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