Maccormack technique

Obad · September 12, 2013, 14:58

Hy!

I'm currently trying to simulate over- and underexpanded flow of a Laval nozzle. For that purpose I use the Maccormack technique.
For internal nodes the technique is pretty easy, but I don't know how to deal with the predictor and corrector step at boundaries.

I will try to explain my problem by using an example.

Consider a boundary where I have to extrapolate the values from the inside. The Maccormack techniqe uses a predictor and a corrector step. Should I do the extrapolation twice, hence between the steps to get a predicted value for the boundary and after the corrector step?

ssjat · May 13, 2020, 09:27

Hi,

I know its been a long time since this question was posted.
I am facing the exact same issue.
How did you resolve your problem ?

September 12, 2013, 14:58	Maccormack technique	#1
Obad Member Obad Join Date: Sep 2013 Posts: 42 Rep Power: 12	Hy! I'm currently trying to simulate over- and underexpanded flow of a Laval nozzle. For that purpose I use the Maccormack technique. For internal nodes the technique is pretty easy, but I don't know how to deal with the predictor and corrector step at boundaries. I will try to explain my problem by using an example. Consider a boundary where I have to extrapolate the values from the inside. The Maccormack techniqe uses a predictor and a corrector step. Should I do the extrapolation twice, hence between the steps to get a predicted value for the boundary and after the corrector step?

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May 13, 2020, 09:27		#2
ssjat New Member shashank Join Date: May 2020 Posts: 1 Rep Power: 0	Hi, I know its been a long time since this question was posted. I am facing the exact same issue. How did you resolve your problem ?