Abstract
Free-molecule internal flows through a circular tube with sudden enlargement or contraction are analyzed by kinetic theory of gases. Attention is paid to the formulation of the surface-collision density, and then simultaneous integral equations with discontinuous kernel are derived for the up- and downstream circular tubes. Numerical solutions show that the fluid-dynamic effect due to the sudden change of a cross-sectional area brings about a peculiar behavior of the distribution of the surface-collision densities, and it depends more strongly on the length to diameter ratio than on the degree of enlargement or contraction. The total conductance of tubes having a relatively short length differs significantly from a conductance for each tube element.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.