Spring analogy method for generating of 2D unstructured dynamic meshes

Spring analogy method (SAM) was improved through controlling mesh quality here. Then, its results were compared with those obtained through the traditional SAM. It was shown from numerical simulations that mesh quality declines with increase in rotation angle in the unstructured dynamic meshes based on SAM; the quality of the mesh generated with the improved SAM is better than that generated with the traditional SAM for the same rotation angles; mesh deformation capability of the improved SAM is larger than that of the traditional SAM; the max rotation angle of the model boundary is about 13° with the traditional SAM and 27° with the improved SAM. Finally, numerical simulations of a two-dimensional airfoil using the improved SAM were conducted. It was found that the results of the improved SAM show a better agreement with the experiment ones; the improved SAM can be used in real numerical simulations effectively.