About the accuracy of DNS with spectral method and FVM method -- CFD Online Discussion Forums

May 20, 2014, 21:16	About the accuracy of DNS with spectral method and FVM method	#1
huangxianbei Senior Member Huang Xianbei Join Date: Sep 2013 Location: Yangzhou,China Posts: 302 Rep Power: 13	As known, the usual way to perform a DNS is the pseudo-spectral method, even though the grid is larger than Kolmogorov scale, the calculation is expected to be accurate. While when FVM is used, I'm suggested to use a finer mesh if I want to perform a DNS with FVM. So here I have a question: Is FVM DNS needs the grid to be smaller than the Kolmogorov scale?

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