Advanced Software for Two-Phase Thermohydraulic Systems

Recent improvements in the SINDA/FLUINT computer program have made the program into a highly capable, commercially viable software product for general mathematical modeling of thermohydraulic systems. Versions of SINDA/FLUINT have been described in a number of previous NASA Tech Briefs articles. To recapitulate: SINDA/FLUINT is the NASA standard software system for computational simulation of interacting thermal and fluid effects in arbitrary flow networks. As its name suggests, SINDA/FLUINT is an integral combination of two subprograms: Systems Improved Numerical Differencing Analyzer (SINDA) program is a software system for solving lumped-parameter representations of physical problems governed by diffusion-type equations. The Fluid Integrator (FLUINT) program is an advanced one-dimensional fluid-analysis program that solves equations of arbitrary fluid-flow networks. Working fluids that can be modeled in SINDA/FLUINT include single-phase vapors, single-phase liquids, and two-phase fluids.