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manariel

银虫 (小有名气)

[求助] 质量流量入口边界中湍流的设定?

请问在边界条件的设置中质量流量入口面板的湍流参数如何设定?

质量流量入口设置面板
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whcjordan123

金虫 (小有名气)

【答案】应助回帖

★ ★
感谢参与,应助指数 +1
xiegangmai: 金币+1, 谢谢参与! 2012-03-21 17:32:42
manariel: 金币+1, 感谢帮助,不过有些笼统了 2012-03-22 16:53:02
Specification of Turbulence Quantities Using Profiles
If it is important to accurately represent a boundary layer or fully-developed turbulent

ow at the inlet, you should ideally set the turbulence quantities by creating a boundary
pro le le (see Section 7.26: Boundary Pro les) from experimental data or empirical
formulas. If you have an analytical description of the pro le, rather than data points,
you can either use this analytical description to create a boundary pro le le, or create a
user-de ned function to provide the inlet boundary information. (See the separate UDF
Manual for information on user-de ned functions.)
Once you have created the pro le function, you can use it as described below:
 Spalart-Allmaras model: Choose Turbulent Viscosity or Turbulent Viscosity Ratio in
the Turbulence Speci cation Method drop-down list and select the appropriate pro le
name in the drop-down list next to Turbulent Viscosity or Turbulent Viscosity Ratio.
FLUENT computes the boundary value for the modi ed turbulent viscosity, ~ , by
combining t= with the appropriate values of density and molecular viscosity.
 k- models: Choose K and Epsilon in the Turbulence Speci cation Method drop-down
list and select the appropriate pro le names in the drop-down lists next to Turb.
Kinetic Energy and Turb. Dissipation Rate.
 k-! models: Choose K and Omega in the Turbulence Speci cation Method drop-down
list and select the appropriate pro le names in the drop-down lists next to Turb.
Kinetic Energy and Spec. Dissipation Rate.
 Reynolds stress model: Choose K and Epsilon in the Turbulence Speci cation Method
drop-down list and select the appropriate pro le names in the drop-down lists
next to Turb. Kinetic Energy and Turb. Dissipation Rate. Choose Reynolds-Stress
Components in the Reynolds-Stress Speci cation Method drop-down list and select
the appropriate pro le name in the drop-down list next to each of the individual
Reynolds-stress components.
这是FLUENT用户指南上关于湍流参数设定的指导,直接拷的,应该不用给你翻译了吧
有容乃大!
2楼2012-03-21 14:50:11
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solidrocket

木虫 (正式写手)

木虫之王

【答案】应助回帖

★ ★
感谢参与,应助指数 +1
臭水沟: 金币+2, 谢谢交流~~ 2012-04-02 15:39:25
这些问题fluent help中其实都说的很详细了,不管你是速度进口、质量流率进口还是压力进口,进口条件中只要你用了湍流模型,那么湍流参数都是要自己定义的,当然可以直接指定k和e,因为你用的是k-e模型;但是前提是你要知道一些参数,然后自己计算出来。如果未知,也不知道怎么算,最简单的可以在湍流参数控制面板中,选择湍流强度和水力直径,湍流强度有个估算公式,自己查下,跟你的Re有关;水力直径,对于圆管的话,就是直径。希望对你有帮助
小木虫是个好网站!
3楼2012-04-02 11:46:35
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westlifexp

铜虫 (小有名气)

我这边有个计算湍流强度的软件,如果你需要的话,我可以发给你,但是怎么发给你啊。。。
fluent模拟粉末注塑成型
4楼2012-04-25 09:44:16
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490464123

新虫 (正式写手)

引用回帖:
4楼: Originally posted by westlifexp at 2012-04-25 09:44:16
我这边有个计算湍流强度的软件,如果你需要的话,我可以发给你,但是怎么发给你啊。。。

你好,能不能把湍流强度的软件发我下,我的邮箱是zxe7866321@126.com,非常感谢!
掌握节奏
5楼2015-04-04 20:31:35
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