Transient Thermohydraulic Heat Pipe Modeling

Abstract. The throhput code, which models transient thermohydraulic heat pipe behavior, is being incorporated into the Csar computational physics development environment. The Csar environment provides many benecial features for enhanced model development, including levelized design unit testing, Design by ContractTM(Meyer,1997), and literate programming (Knuth, 1992), in a parallel, object-based manner. The original throhput code was developed as a doctoral thesis research code; the current emphasis is on making a robust, veriable, documented,component-based production package. Results from the original code are included.
THE THROHPUT CODE
Heat pipes are structures that transport heat by the evaporation and condensation of a working uid, giving them a high eective thermal conductivity. Many space-based uses for heat pipes have been suggested, and high temperature heat pipes using liquid metals as working  uids are especially attractive for these purposes. These heat pipes are modeled by the throhput code (throhput is an acronym for Thermal Hydraulic Response Of Heat Pipes Under Transients and is pronounced the same as the word \throughput").
Summary Description of THROHPUT
The throhput code provides a detailed model of the transient, thermohydraulic behavior of liquid metal heat pipes. Currently, it models homogeneous or composite wicks in a cylindrical heat pipe structure. The boundary conditions assumed are: a time-dependent heat input in the evaporator section, zero heat transfer at the outer wall in the adiabatic section, and radiative cooling to a specied ambient temperature in the condenser section. The user species the dimensions of the heat pipe and of the wick structure.