On the Partition Method of Frictional Pressure Drop for Dispersed Two-Phase Flows in the RELAP5/MOD3, TRACE V5, and SPACE Codes

摘要

Frictional pressure drop (also called wall drag) for a two-phase flow has been investigated for several decades. However, the two-phase frictional pressure drop models in the state-of-the-art thermal-hydraulic system codes are significantly different from each other, especially in the way to partition the wall friction force of liquid and vapor phases in the two-fluid momentum equations. This may lead to unphysical results in some flow conditions.