Difference between revisions of "Coupled multi-physics calculations"

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(Created page with "== External coupling == == Iteration == == Power relaxation == The power in the coupled calculation is...")
 
(Power relaxation)
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== Power relaxation ==
 
== Power relaxation ==
  
The power in the coupled calculation is...
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Serpent relaxes the power distribution calculated in the iterations using the stochastic approximation based method, where the power distribution at iteration <math>n</math> is calculated by
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<math>P_{\mathrm{rel}}^{n} = P_{\mathrm{rel}}^{n-1} - \frac{s_{n}}{\sum_{i = 1}^{n} s_{n}} d \left(P_{\mathrm{rel}}^{n-1} - P^{n}\right),</math>
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where <math>P^{n}</math> is the unrelaxed power distribution tallied on iteration <math>n</math>, <math>P_{\mathrm{rel}}^{n-1}</math> is the relaxed power distribution after the previous iteration, <math>s_{i}</math> is the active neutron population simulated on iteration <math>i</math> and <math>d</math> is an underrelaxation factor that can be defined by the [[Input syntax manual#set relfactor|set relfactor]] option.

Revision as of 12:35, 27 November 2015

External coupling

Iteration

Power relaxation

Serpent relaxes the power distribution calculated in the iterations using the stochastic approximation based method, where the power distribution at iteration n is calculated by

P_{\mathrm{rel}}^{n} = P_{\mathrm{rel}}^{n-1} - \frac{s_{n}}{\sum_{i = 1}^{n} s_{n}} d \left(P_{\mathrm{rel}}^{n-1} - P^{n}\right),

where P^{n} is the unrelaxed power distribution tallied on iteration n, P_{\mathrm{rel}}^{n-1} is the relaxed power distribution after the previous iteration, s_{i} is the active neutron population simulated on iteration i and d is an underrelaxation factor that can be defined by the set relfactor option.