Length Scale Option
When using the Auto Timescale option for fluid domains in a steady-state simulation, the Length Scale Option may also be set. The length scale is used by the solver to evaluate a time scale based on.
The options are, there are three types:
1-Conservative
2-Aggresive
3-Specfied length scale
1-Conservative
2-Aggresive
3-Specfied length scale
Remember the smallest length scale is the Kolmogrove length scale shown in the image below as Id, the Eddy size length scale depends on the generated size of the vortex structure. DNS resolves all the fluid domain length scales. RANS models the domain length scales, whiles LES models a range of length scales and resolves the rest.
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