Kinetic theory of drag on objects in nearly free molecular flow

J.V. Sengers, Y.-Y. Lin Wang, B. Kamgar-Parsi and J.R. Dorfman

Physica A: Statistical Mechanics and its Applications, 2014, vol. 413, issue C, 409-425

Abstract: Using an analogy between the density expansion of the transport coefficients of moderately dense gases and the inverse-Knudsen-number expansion of the drag on objects in nearly free molecular flows, we formulate the collision integrals that determine the first correction term to the free-molecular drag limit. We then show how the procedure can be applied to calculate the drag coefficients of an oriented disc and a sphere as a function of the speed ratio.

Keywords: Kinetic theory; Drag coefficient; Inverse-Knudsen-number expansion; Nearly free molecular flow; Speed ratio (search for similar items in EconPapers)
Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:413:y:2014:i:c:p:409-425

DOI: 10.1016/j.physa.2014.06.026

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