Learning Forum

[tracyxu]

I am solving a single rotating reference frame problem. Basically I have a cylindrical drum with water inside, both rotating with respect to the Y axis. I have the volumetric heat source in a spot in the solid zone, which is not rotating with the cylindrical drum. In other words, the heat spot is fixed in space. The solid and fluid zones are rotating at the same speed to cool the drum. I defined the rotational frame motion in the fluid-zone, and defined the wall-fluid to be a stationary wall with respect to the water. If I do not define the frame motion of solid zone, as FLUENT User's Guide suggests, "For solid zones, you only need to activate the Moving Reference Frame option if you intend to include the convective terms in the energy equation for the solid. Normally, this is not required if you wish to do a conjugate heat transfer problem where the solid and fluid zones are moving together." The simulation results are, the high temperature on the solid is only a spot, which indicates that the solid is not rotating. However, if I define the rotational frame motion in the solid zone such that the relative speed to water is 0 rpm. The energy equation does not converge.