Direct Numerical Simulation- for pipe flow
I would like to know what DNS is all about...... how to go about writing a code for DNS for a pipe flow....
I went through a paper and got an idea that it is like spectral method applied to N-S equaitons...
if any one is familiar with DNS please let me know I want to have a genuine discussion with people working on DNS
DNS means the direct integration of the Navier Stokes equations, in essence:
- 3D unsteady simulation
- high order scheme for both the spatial and temporal parts of the NS equation
- huge computer power (for real life applications)
If all you need is a pipe simulation you probably will be able to use a structured mesh and a high order finite difference scheme. Depending on your Reynolds number you can simulate this on a single machine or if you have a big Re number on a cluster.
I have read in a paper on DNS simulation of a channel flow where in the unknown functions are expanded with a basis functions and the resulting equations are solved by integrating in time..
how many ways are there to solve DNS
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