When I use the Monte Carlo radiation model and then plot temperature against distance, the profile is very bumpy. Should I increase the number of histories to obtain a smoother curve?
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Profiles of this type can be caused by the statistical variation inherent in the Monte Carlo model. Rather than increasing the computational requirements by increasing the number of histores, it may be possible to reduce the effect by under-relaxing the radiation flux, as shown in the ccl below. FLOW: SOLVER CONTROL: THERMAL RADIATION CONTROL: VARIABLE: Qrad Option = Definition Under Relaxation Factor = 0.2 END END END END |
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