Abstract
An approximate expression for the thermophoretic force on a near-wall particle at large particle Knudsen number is presented. The wall has arbitrary specularity. The derivation of this expression follows that of Chen and Xu (2002) but corrects two errors in their approach. The corrected expression predicts that the near-wall thermophoretic force is only 5-10% greater than the bulk-gas (Waldmann) value and that the greatest difference occurs for a specular wall, whereas the original expression predicts that the force is increased up to 35% and that the greatest difference occurs for a diffuse wall. Independent molecular gas dynamics simulations confirm the corrected expression.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
