Abstract:

In order to solve the existing problems in the current RBF applications，a new improvement scheme based on scaling the mesh by geometry size in three dimensions is proposed. The airfoil and wing-body two different cases are adopted to exam the effect of this new method on accuracy, efficiency and conservation. The test results indicate that these three widely used radial basis functions TPS, MQ and Compact Support C 2 all can achieve improvements in accuracy and boundary heat flux conservation after adopting this new method. Particularly, the Compact Support C 2 function has the most significant improvement. It shows obviously that with this method, Compact Support C 2 function achieves a good balance between the accuracy and efficiency and has a great application prospect in fluid-thermal-structure coupling data transfer applications.

Key words: Fluid-thermal-structure coupling, Data transfer, Scale normalization, Radial basis function