A computational model for a regenerator
Abstract
This paper concerns a numerical model of a regenerator running at very low temperatures. The model consists of the usual three equations for a compressible fluid with an additional equation for a matrix temperature. The main difficulty with the model is the very low Mach number (approximately 1.E3). The divergence of the velocity is not small, the pressure divergence is small, and the pressure fluctuation in time is not small. An asymptotic expansion based on the bounded derivative method of Kreiss is used to give a reduced model which eliminates acoustic waves. The velocity is then determined by a twopoint boundary value problem which does not contain a time derivative. The solution obtained from the reduced system is compared with the numerical solution of the original system.
 Publication:

In its Proc. of the 3rd Cryocooler Conf. p 199211 (SEE N8611367 0231
 Pub Date:
 May 1985
 Bibcode:
 1985crcc.proc..199G
 Keywords:

 Compressible Flow;
 Heat Transfer;
 Mathematical Models;
 Regenerators;
 Boundary Value Problems;
 Computation;
 Low Temperature;
 Engineering (General)