Temperature Analogy Method (TAM) is a new dynamic grids method using temperature analogy. Its rotation deformability was researched in this paper. For dynamic grids methods, their rotation deformability depends on their transfer modes of rotary deformation. First, taking rotating cylinders with different sizes as examples, the transfer modes of rotation deformability for TAM, spring analogy and elasticity approach were compared. Spring analogy and elasticity approach are two most popular dynamic grids methods nowadays. The analysis shows that spring analogy and elasticity approach decompose rotation around an axis into the translation along the axis. So they transfer false rotation deformation, which makes grids deformation aggregate around moving boundaries and grids around moving boundaries are distorted seriously and even staggered. However, TAM introduces rotation map to transfer the rotation of moving boundaries correctly and effectively within the whole computational domains, which avoids the false rotation deformation transfer. Second, TAM and spring analogy were used to generate dynamic grids of airfoil rotation separately. The results show that the dynamic grids generated by TAM are of good quality even for the airfoil with large scale rotation. But the dynamic grids generated by spring analogy are easy to be distorted near the moving boundaries of the airfoil. Above work indicates TAM is of greater advantages in rotation deformability.
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