Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 11, 2020 - November 13, 2020
The particle-based method for computational fluid dynamics is one of the powerful methods to simulate the multi-phase flows because of the advantages such as the sharp interface tracking and conservation of the fluid. Thus, the particle method has been introduced for engineering design. However, comparing with the grid-based methods, it generally takes long CPU time to obtain solutions, especially for multiphysics problems. Therefore, we need to improve or modify the particle-based method in this point of view. In the present study, we focus on a heat transfer problem between a impinging jet and a wall. Concretely, the purpose of this study is to construct a heat transfer model calculated from the flow field information. By applying the empirical formulation of local heat transfer coefficient, we developed a new model to estimate the heat transfer of collision liquid jet cooling. The developed model consists of following estimations; the local heat transfer coefficient model on the wall surface, the characteristic velocity and length scales of the Reynolds and Nusselt numbers of computational particles near the stagnation point. The present model was validated by comparing with the correlation equation of the impinging jet for the heat transfer coefficient. In addition, the effect of each modification was discussed in terms of the estimation for heat transfer coefficient. Comparing the accuracy of the correlation equation with the developed model, the deviation is less than ten percent. Therefore, the proposed model showed reasonable agreement with the experiment.
