Simulation of Fluid behavior on Thermally Driven Flow Unit (TDFU)

Abstract

Thermally Driven Flow Unit (TDFU) experiment was performed as a mission of IML-2 Project. TDFU is a thermal accumulator model for Two-Phase Fluid Loop. One of TDFU experiment's purposes was to verify Liquid/Vapor phase-separation and liquid positioning at core section in TDFU vessels, and was satisfactorily achieved in IML-2 Project. Be­ sides, in NASDA, another vessel experiments abroad airplane was performed as preflight estima­tion. This paper presents numerical simulation analysis on above exprimenal results basis, and the method of modeling the surface tension and the wall adhesion force in the absence of gravity.