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Showing results 1 to 7 of 7 Search took 0.00 seconds. Search: Posts Made By: FMDenaro

Forum: Main CFD Forum July 4, 2019, 03:26

Replies: 16 Convection - Diffusion Spectral Study for Finite Difference Methods Views: 1,022 Posted By FMDenaro When you compare the exact and the numerical... When you compare the exact and the numerical solution you should be aware that: - this is the discretization error but the order of accuracy of a scheme is defined by means of the local truncation...

Forum: Main CFD Forum July 2, 2019, 17:30

Replies: 16 Convection - Diffusion Spectral Study for Finite Difference Methods Views: 1,022 Posted By FMDenaro I agree that the real analysis requires to take... I agree that the real analysis requires to take into account the full time-space discretization. In other words, the guideline for the analysis is the modified PDE induced by the full discretization....

Forum: Main CFD Forum July 2, 2019, 09:50

Replies: 16 Convection - Diffusion Spectral Study for Finite Difference Methods Views: 1,022 Posted By FMDenaro A discussion about the original von Neumann... A discussion about the original von Neumann stability analysis and the different approach that the authors adopt in those studies was discussed also here ...

Forum: Main CFD Forum July 1, 2019, 07:09

Replies: 16 Convection - Diffusion Spectral Study for Finite Difference Methods Views: 1,022 Posted By FMDenaro Have a look to the textbook of Hirsch, that is... Have a look to the textbook of Hirsch, that is explained in simple way

Forum: Main CFD Forum July 1, 2019, 03:15

Replies: 16 Convection - Diffusion Spectral Study for Finite Difference Methods Views: 1,022 Posted By FMDenaro Julio you don't need of a real spectral method... Julio you don't need of a real spectral method or an FFT routine. Just consider what is the process in the von Neumann stability, that is write the discrete scheme, insert the generic Fourier...

Forum: Main CFD Forum June 30, 2019, 18:58

Replies: 16 Convection - Diffusion Spectral Study for Finite Difference Methods Views: 1,022 Posted By FMDenaro The amplification factor Gnum is obtained from... The amplification factor Gnum is obtained from the numerical scheme when you insert the generic Fourier component Fk(t)*exp(i*k*x) in each term. This is the numerical solution you are supposing. When...

Forum: Main CFD Forum June 30, 2019, 11:30

Replies: 16 Convection - Diffusion Spectral Study for Finite Difference Methods Views: 1,022 Posted By FMDenaro Hello Julio I read that paper some time... Hello Julio I read that paper some time ago, Part 2 is based on the transformation of the original PDE in the Fourier space. Then the resulting ODE is integrate and provides the Gphys...

Showing results 1 to 7 of 7

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