Anisotropic turbulence model applied to rotating channel

An anisotropic kω model adapted to simulate the rotating channel was proposed based on the simplified model of algebraic Reynolds stress equation combined with the turbulent fluctuation data obtained from the direct numerical simulation(DNS) calculation of the full development rotating channel. A rotating straight channel with the inlet Reynolds number of 6000 and the rotation number ranging from 0 to 026 was studied. Results show that the anisotropic kω model is modified by the means of the rotation correction coefficient multiplied by the traditional turbulence viscosity coefficient. The modified model can describe the heat transfer situation of the leading and trailing surfaces in the rotating channel accurately, which is an effective method for anisotropic turbulence model correction. The accurate description of the Reynolds stress ratio is the key to the rotation correction coefficient. The heat transfer effect of the rotating channel is related to the rotation number and the dimensionless distance along the flow direction. The heat transfer effect of leading surface decreases with the increasing rotation number and dimensionless distance. However, the situation of the trailing surface is opposite, that is to say, with the increase of rotation number and dimensionless distance, the heat transfer effect of trailing surface is enhanced.