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January 12, 2005, 06:15 |
Artificail Vistocity/ Numerical Dissipation
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#1 |
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Hi, Can Any one provide any information related to the Jameson's dessipation form.
I am coding MacCormack Scheme and I need to add an artificial viscosity to stabilise the solution of a 1D shock wave inside a Con-Di Nozzle. any Advice or references will be helpful Thanks. M. |
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January 12, 2005, 09:06 |
Re: Artificail Vistocity/ Numerical Dissipation
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#2 |
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Hi Meriem I am close to you problem now. I use MacCormack Scheme with TVD-algorithm. Take a look at this paper:
A. Onorati. M. Perotti, S. Rebay, Modelling 1-D Unsteady Flows in Ducts: Symmetric Finite Difference Schemes vs. Galerkin Discontinuous Finite Element Methods, International Journal of Mechanical Sciences, Vol. 39, no. 11, pp. 1213-1236, 1997. Obviously, if you want to make things fast and roughly you may try simple smoothing: u_new[i]=u[i]*(1-2*nu)+nu*(u[i+1]+u[i-1]) |
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January 12, 2005, 09:15 |
Re: Artificail Vistocity/ Numerical Dissipation
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#3 |
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Thank you So much Alexander
I will try them and let you know what I got. Cheers. Meriem |
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February 6, 2005, 13:28 |
Re: Artificail Vistocity/ Numerical Dissipation
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#4 |
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