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bianborui88

铁虫 (小有名气)

[求助] Comsol仿真中出现问题!求助各位大牛!!!! 已有1人参与

Comsol仿真报错!如何解决?
Error:
    Failed to find a solution:
    The relative error (6.1e-005) is greater than the relative tolerance.
    Returned solution has not converged.
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dk1013

木虫 (正式写手)

引用回帖:
6楼: Originally posted by erin_pan at 2013-12-18 08:59:25
你好!那个segregated solver 和fully coupled solver这两个有什么差别啊?segregated solver 是不是可以控制求解的先后顺序?...

Both the segregated and couple fully coupled solvers require iterations for nonlinear problems. They both also can use direct or iterative linear solvers. The main difference is that the fully coupled solver operates on the full Jacobian matrix as one entity. The segregated solver splits the Jacobian matrix into smaller sub-problems, usually by degree of freedom type. Different solution strategies can then be used for each sub-problem. The optimal choice between segregated and fully coupled as well as the optimal segregation technique is problem specific.

Usually, the fully coupled solver generally requires less iterations but takes up more memory and solution time per iteration.
到得还来别无事 庐山烟雨浙江潮
7楼2013-12-18 15:06:06
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wangjade6181

至尊木虫 (著名写手)

根据报错,应该是结果不收敛,建议修改参数,重新仿真。
修炼
2楼2012-11-07 15:09:34
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bianborui88

铁虫 (小有名气)

引用回帖:
2楼: Originally posted by wangjade6181 at 2012-11-07 15:09:34
根据报错,应该是结果不收敛,建议修改参数,重新仿真。

相对误差要比相对冗余大,是不是网格剖分太粗的问题呢?
3楼2012-11-07 15:15:05
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wangjade6181

至尊木虫 (著名写手)

具体情况不了解,感觉上是这样。
修炼
4楼2012-11-07 15:44:10
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