Steady and Unsteady Computational Results of Full Two Dimensional Governing Equations for Annular Internal Condensing Flows

R. Naik[1], S. Mitra[1], A. Narain[1], N. Shankar[1]
[1]Michigan Technological University, Houghton, MI, USA
发布日期 2013

This paper presents steady and unsteady computational results obtained from numerical solutions of the full two-dimensional governing equations for annular internal condensing flows in a channel. This is achieved by tracking the “sharp” interface while solving the flow fields using COMSOL Multiphysics® and MATLAB®. The unsteady wave simulation capability is used to predict heat-transfer rates and annular regime lengths for condensing flows, which are necessary for designing modern high heat-load condensers. In addition, the results obtained for inclined, horizontal, and zero-gravity cases bring out the differences between shear driven and gravity assisted/driven flows. This accurate simulation capability leads to significant accuracy improvements over earlier reported simulation capabilities and other existing fixed grid solution techniques.