Boundary-value problems in the kinetic theory of gases Part I. Slip flow

1969 ◽  
Vol 36 (1) ◽  
pp. 145-159 ◽  
Author(s):  
M. M. R. Williams
Keyword(s):  
Distribution Function ◽  
Kinetic Theory ◽  
Boundary Value Problems ◽  
Neutron Transport ◽  
Boundary Value ◽  
Slip Flow ◽  
New Method ◽  
Milne Problem ◽  
Molecular Distribution ◽  
Molecular Distribution Function

A new method for treating boundary-value problems in gas-kinetic theory has been developed. The new method has the advantage of reproducing the bulk or asymptotic flow properties accurately whilst giving a realistic description of the behaviour of the molecular distribution function in the neighbourhood of a wall. As an example, the Kramers, or slip-flow, problem is solved for a general specular-diffuse boundary condition and some new expressions for the slip coefficient, flow speed and molecular distribution function at the surface are derived.A brief discussion of the eigenvalue spectrum of the associated Boltzmann equation is given and its physical significance pointed out.Certain analogies between this problem and the Milne problem in neutron transport theory are demonstrated.

A new method for calculating eigenvalues with applications to gravity-capillary waves with edge constraints

1983 ◽  
Vol 94 (3) ◽  
pp. 553-564 ◽  
Author(s):  
James Graham-Eagle
Keyword(s):  
Boundary Value Problems ◽  
Variational Formulation ◽  
Boundary Value ◽  
Capillary Waves ◽  
Original Study ◽  
New Method ◽  
Linear Boundary ◽  
Hydrodynamic Problem ◽  
Alternative Means ◽  
Standard Linear

The method to be described provides an alternative means of dealing with certain non-standard linear boundary-value problems. It is developed in several applications to the theory of gravity-capillary waves. The analysis is based on a variational formulation of the hydrodynamic problem, being motivated by and extending the original study by Benjamin and Scott [3].

Numerical Solution of the Beam Equation With Nonuniform Foundation Coefficient

1979 ◽  
Vol 46 (4) ◽  
pp. 901-904 ◽  
Author(s):  
M. Lentini
Keyword(s):  
Differential Equations ◽  
Numerical Solution ◽  
Ordinary Differential Equations ◽  
Boundary Value Problems ◽  
Boundary Value ◽  
New Method ◽  
Beam Equation ◽  
Infinite Intervals

A new method for computing the solutions of the beam equation is given for the case of the problem of a pile. The method could be used for other problems where it is necessary to solve boundary-value problems for ordinary differential equations over semi-infinite intervals.

Sign in / Sign up

Export Citation Format

Share Document