Detailed transient model of a liquid-metal heat pipe

A detailed transient model of a liquid-metal heat pipe is being developed. The model includes start from the frozen state, with provision for free-molecule flow, and proceeds through the steady-state operating conditions. The KACHINA method has been selected for simulating the compressible flow in the core; the SIMPLER method, for simulating the liquid flow in the wicks and grooves. The computational methods have been demonstrated on a Compaq Deskpro II. The FORTRAN cove is currently being converted to the IBM 3033 and Cray I. Based on the ratio of Cray to Compaq speeds, the Cray computation times are estimated to be 30 minutes per hour simulated.