【讨论】COMSOL里chem模块non-Newtonin 模型参数

asaki

请问各位 针对out of memory
有什么好方法吗？

asaki

采用refinement mesh  通过局部的点周围加密 boundary加密 能稍微减小这种情况 还有其他饿办法吗？

asaki

有人能把M文件导出成MPH文件吗

我这里一算就out of memory了

邮箱：asakiayumikio@163.com

kinggun

抱歉，网格生成地密了点。呵呵，要不然也不好收敛了。我是在一台2G内存的IBM T60本本上计算的。我来给你发邮件吧。

[ 本帖最后由 kinggun 于 2008-12-2 16:26 编辑 ]

asaki

e斑竹用的是3.5的版本啊 汗

kinggun

呵呵，现在满街跑的都是3。5版本啦。中仿科技前一阵还发了好多试用哩。

asaki

呵呵 我还没下载完呢 呵呵 那就等我装完3.5的在跑版主的MPH

亚丁

值得学习

tikky83

为什么reset model之后再网格重新计算会出错啊？~~~

二维的reset正常~~三维的reset之后就全看不到彩色云图了

min和max全是0·~~这是为什么啊？

wangku001wei

楼主很厉害！向楼主学习！

61yuna

asaki 发表于 2008-12-2 11:08
有人能把M文件导出成MPH文件吗

我这里一算就out of memory了

comsol中自带的《Introduction to COMSOL Multiphysics》中的扳手的例子中用了这个方法，不知是否算一个方法。 自己用过有效果，但是计算量过大，这个办法也没用。比如，我在Busbar例子中用过两次，前一次能实现，第二次无法实现。
粘贴复制下步骤，原理可能是用硬盘来做一些虚拟内存吧，猜的，呵呵。不过每个求解器好像最多只能提供512M。
You can easily solve this example model on a memory-limited machine by allowing
the solverto use the hard drive instead of performing all of the computation using
RAM. The steps below show how to do this. If your computer has more than
2 GB of RAM you can skip to the end of this section after step 5 below.

1. If you did not alr eady star t the computation, you can get access to the solver
settings fr om the Study node. In the Model Builder,right-click Study 1
and choose Show Default Solver .

2.Under Study 1>Solver Configurations,
expand the Solver 1 node

3.Expand the Stationary Solver 1 node
and left-click Dir ect .
A Direct solver is a fast and ver y r obust
type of solver that r equir es little or no
manual tuning in or der to solve a wide
range of physics pr oblems. The drawback
is that it may r equir e large amounts of
RAM.

4.In the Direct settings
window, in the General
section, select the
Out-of-cor e check box.
Leave the default
In-cor e memor y
(RAM) setting of
512 MB.
This setting ensures
that if your computer
runs low of RAM
during computation,
the solver will star t
using the har d drive as a
complement to RAM. Allowing the solver to use the har d drive instead of just
RAM will slow the computation down somewhat.

5.Right-click Study1 and select Compute (or pr ess F8).
After a few seconds of computation time, the default plot is displayed in the
Graphics window. You can find other useful information about the computation
in the Messages and Log windows; click the Messages and Log tabs under the
Graphics window to see the kind of information available to you. These windows
can also be opened from the main View menu.

61yuna

PS；跟楼主一样，同样要做非牛顿流体的分析，一起交流学习！  这个帖子对我很有价值。

BIHI123

弱弱的问一句，m文件怎么打开。