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-   -   How to active "3rd Order Upwind Monotonicity Preserving" ? (http://www.cfd-online.com/Forums/flow-3d/97489-how-active-3rd-order-upwind-monotonicity-preserving.html)

wind February 18, 2012 04:59

How to active "3rd Order Upwind Monotonicity Preserving" ?
 
In flow-3D user site, I read a tip of choosing an Advection Method. it says:

IORDER=1 1st Order Momentum Advection
IORDER=2 2nd Order Centered
IORDER=3 2nd Order Upwind Monotonicity Preserving
IORDER=4 3rd Order Upwind Monotonicity Preserving

but in Flow-3D ver. 10.01, there is not "IORDER=4 3rd Order Upwind Monotonicity Preserving" at all. Even I change the value of iorder in prepin file, it doesn't appear when the prepin file is opened.

So I woul like to ask:

Is there really a "3rd Order Upwind Monotonicity Preserving" in the Flow-3D? and if, how to activate it? thanks!

melissa February 21, 2012 11:16

The IORDER=4 3rd Order Upwind Monotonicity Preserving was removed because it had not been correctly implemented near solid and mesh boundaries, and it would have been counter-productive to make it right. If it can be shown to be useful it may be added back in.


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