shaoyun1987 发表于 2010-2-9 08:14:51

求助--请问在ansys的Fortran中如何计算对流换热系数?

模型是在一个有喷嘴的烘箱里面,有一个在热气流作用下悬浮的PET薄膜,现在想计算该薄膜与上下空气的对流换热系数,请问需要一些什么样的条件?如果需要耦合,需要怎么弄,希望能得到一些提示。
我的邮箱是shaoyunsjj@hotmail.com。可以共同探讨,谢谢

shaoyun1987 发表于 2010-2-9 12:24:59

这个论坛感觉人气不高。最近都没有人来

shaoyun1987 发表于 2010-2-9 08:15:27

如果您知道,请给我一点提示,不甚感激,网上关于这个的资源很少。

shaoyun1987 发表于 2010-2-9 12:23:54

每天都来逛逛,坐着等:lol

iomega 发表于 2010-2-9 13:21:13

Hehe, this s not a simple problem if you want to solve the whole-field problem using the fluid-solid coupled model. But if have the air flow velocity,a simple estimation of convective heat transfer coefficient is possible.

shaoyun1987 发表于 2010-2-9 16:50:02

我也知道并不容易,我只有进入喷嘴的流量与温度,这两个值有设备来测量,薄膜现在只能简化当成一个面。我现在想计算出对流换热系数,根据一般资料,ansys可以通过温度边界条件计算出热通量和对流换热系数。
或者通过热通量边界条件计算出温度与对流换热系数
谢谢斑竹的建议,不过最好我们能继续探讨下去哦:) 5# iomega

iomega 发表于 2010-2-12 11:03:27

Sorry I can not help you more as I am not an expert in ANSYS and most stufff I am working on is related to the heat conduction in solid.

6# shaoyun1987

shaoyun1987 发表于 2010-3-11 09:56:34

who can help me ?

shaoyun1987 发表于 2010-3-11 09:57:53

help myself by my own strength!

fawwi 发表于 2010-4-13 15:25:29

求解时在gui下依次点击Solution>FLOTRAN Setup>Additional Out>RFL Output Derived,在所得到的对话框中有一项:HFLM Output film coefficients?,将它设为yes,这样就可以求出对流系数了。
在POST1后处理器中,可以用图示或其他方法显示对流系数,即Nodal Solution中,Other quantities的Film coeff HFLM。

shaoyun1987 发表于 2010-4-20 15:57:09

楼上的那位,太感谢你了,谢谢

chan1983 发表于 2010-4-26 21:01:54

FLOTRAN can calculate film coefficients at walls in conjugate heat transfer problems. Two algorithms are available for this purpose:

chan1983 发表于 2010-4-26 21:03:09

the conductivity matrix algorithm and the temperature field algorithm.

chan1983 发表于 2010-4-26 21:03:34

The conductivity matrix algorithm uses the thermal conductivity matrix to calculate heat fluxes and film coefficients. It is the default. Generally, it produces satisfactory results for well shaped elements. However, if the elements are not well shaped, it can produce non-smooth results. You should then switch to the temperature field algorithm. It calculates film coefficients directly from thermal gradients.

chan1983 发表于 2010-4-26 21:04:09

So ,can you make sense of its principle???

shaoyun1987 发表于 2010-4-27 08:55:07

yes .i see   thank you very much .it's so kind of you !

zoe122208 发表于 2010-5-9 20:03:58

我怎么没有在nodal solution里面发现other quantities呢

zoe122208 发表于 2010-5-9 20:25:19

只有DOF solution

shaoyun1987 发表于 2010-7-26 15:22:19

你是不是没有在flotran set up之前的设置中选择输出对流换热系数呢?不过这个貌似不影响other quality的输出的。你再试试 17# zoe122208

NoEureka 发表于 2013-12-9 10:28:23

楼主,请问你那里有关于计算对流换热系数更详细的资料吗?更理论点的。谢谢了
页: [1]
查看完整版本: 求助--请问在ansys的Fortran中如何计算对流换热系数?