In TASCFLOW and Fluent there are parameters to limit the solution temperature (T_CLIP_LOW = 273 and T_CLIP_HIGH = 3000 in TASCflow)
Are there similar parameters in CFX?
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Below is some CCL that can be used to limit the solution temperature in CFX. LIBRARY: VARIABLE: T Component Lower Bounds = 299 # set as appropriate Component Upper Bounds = 2500 # set as appropriate END END FLOW: SOLVER CONTROL: COMPRESSIBILITY CONTROL: Decreasing Temperature Relaxation = No END END END Because temperature clipping essentially violates the energy balance, this should used sparingly (when only a small area of the solution is affected and all other methods of rectifying the situation have been tried, or when the mesh is known to be too coarse in an area that is away from the region of interest and refinement is not dresirable becasue of time constraints). The temperature bounds should be lower than your coldest boundary condition and higher than your hottest boundary condition or the solver will fail with an out-of-bounds error. |
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