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[Fluent应用] 关于三阶迎风格式

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发表于 2012-2-14 15:28 | 显示全部楼层 |阅读模式

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各位大侠,在fluent中迎风格式这一栏中有这样一种迎风格式third-order MUSCL这种迎风格式适用于哪些场合?
有什么特点!谢谢~!

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发表于 2012-2-17 16:54 | 显示全部楼层
发表于 2012-2-18 09:03 | 显示全部楼层
帮助里面这样说的:
This third-order convection scheme was conceived from the original MUSCL (Monotone
Upstream-Centered Schemes for Conservation Laws) by blending a central di erencing
scheme and second-order upwind scheme .
Unlike the QUICK scheme which is applicable to structured hex meshes only, the MUSCL
scheme is applicable to arbitrary meshes. Compared to the second-order upwind scheme,
the third-order MUSCL has a potential to improve spatial accuracy for all types of meshes
by reducing numerical diffusion, most significantly for complex three-dimensional flows,
and it is available for all transport equations.
The third-order MUSCL currently implemented in FLUENT does not contain any flux-limiter. As a result, it can produce undershoot and overshoot when the flow-field under consideration has discontinuities such as shock waves.

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 楼主| 发表于 2012-2-18 12:18 | 显示全部楼层
虽然看的不是很明白!还是谢谢!
发表于 2012-2-24 10:12 | 显示全部楼层
MUSCL格式可以应用在任何网格和复杂的3维流计算,相比second-order upwind,third-order MUSCL 可以通过减少数值耗散而提高空间精度,并且对所有的传输方程都适用。third-order MUSCL 目前在FLUENT中没有流态限制,可以计算诸如冲击波类的非连续流场。
 楼主| 发表于 2012-2-24 14:18 | 显示全部楼层
恩!楼上的正解,谢谢!
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