An improved numerical scheme to evaluate the pressure gradient on unstructured meshes for two-phase flow analysis

作者：Lee Heedong; Jeong Jae Jun^*; Cho Hyoung Kyu; Yoon Han Young

来源：International Communications in Heat and Mass Transfer, 2010, 37(9): 1273-1279.

DOI：10.1016/j.icheatmasstransfer.2010.07.008

• Two-phase flow
• Unstructured grid
• Pressure gradient reconstruction
• The Frink's method

In multi-dimensional two-phase flows, a local pressure is very important because it directly influences the phase change and it may lead to a great change in the flow field. This in turn puts emphasis on the accurate evaluation of local pressure gradient. This paper presents a new numerical scheme to evaluate the pressure gradient at cell centers on unstructured meshes for a three-dimensional thermal-hydraulic code, named CUPID. The results of the new scheme for a simple test function, a gravity-driven cavity, and a wall boiling two-phase flow are compared with those of the previous schemes in the CUPID code.

• 出版日期2010-11