Equations of the Free-Flow of Molecules Around Objects
Abstract
Equations are derived which express stationary and nonstationary flows of rarefied gas around bodies under conditions of free-molecular flow, where it is necessary to take into consideration the repeated reboundings of gas particles from the surfaces of the bodies around which the flow is directed, due to reasons explained. These equations are formulated without imposition of any limitations on the law of reflection. There is described a method of determining the reflective properties of a surface, possessing a certain finely granular structure; an important special case of the reflection law is discussed, representing a combination of diffusional and mirror reflection; a simplified nonstationary instance is examined where nonstationary movements which are superimposed over the stationary ones, appear to be small; and finally we discuss the flow around bodies of a stream, the parameters of which execute small harmonic oscillations around their mean values.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1961
- Accession Number
- AD0268061
Entities
People
- E. Larish
Organizations
- National Air and Space Intelligence Center