The nonuniform mesh approach with thermal lattice boltzmann mehtod and its allpication

In this paper a new thermal lattice Boltzmann method with nonuniform mesh grids has been proposed, by which the flow and energy transfer progress with curly boundary can be calculated. For validating the present method, the convection of air in an annular cavity was simulated. The result shows that it is accordantly with both the experimental and classical calculational results. With the present method, the annular system based on the thermomagnetic effect of a temperature-sensitive magnetic fluid was investigated. The influences of difference in temperature between heating section and cooling section and the intensity of magnetic field were studied. The results show that the magnetic fluid can flow steadily in the circle channel, in the entrance of heating section and cooling section the distribution of temperature present V figure. As the difference in temperature achieve 50°C, the velocity changes no longer obviously.