Create the Geometry
General Approach
The 2D cross-section geometry reduced from the complex 3D geometry still contains various boundary types. In order to better understand what's happening, we will adopt a "divide and conquer" approach, i.e. to further break down the geometry to elementary parts with basic boundary types and simulate them individually. We will make sure the decomposition captures the key characteristics of the flow field and focus on the major component. We will then analyze the interactions of flows between individual components and synthesize these results to form the bases for a more complex overall simulation.
The processes of decomposition should include the following, which are also iterative cycles based on simulation results:
analyze the feature component of the flow field, make reasonable assumptions, simplify and break down in to elementary parts that capture the major characteristics of the flow, and validate the assumptions and simplifications.