There are many different approaches to solving fluid flow on a computer. Before you start, you need to determine what methodology you will use at a high level, i.e., what governing equations will be solved. This choice will narrow down which computational approaches are available. Assuming a continuum approach is chosen (which is quite common), there are essentially 3 steps.
First, the fluid flow domain (the continuous region to be calculated), is identified (typically represented by a CAD model). Then, a mesh is applied to dissect the domain into well-defined cells. Finally, the discretized version of the governing fluid equations is solved by the computer within each cell. In the context of high-performance computing (HPC), an optional step is assigning different cell groups to different computers for parallel processing.
1. Identify the fluid flow domain to be solved
2. Discretize the domain into the desired mesh size and grid spacing
3. Assign processors to different regions and apply the appropriate calculus equations
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