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___________ creates a problem in the SGS models.

___________ creates a problem in the SGS models. Correct Answer Anisotropic flow near the wall

Near the wall, the flow structure is very anisotropic. Here, regions of low and high-speed fluids are created. This needs a highly anisotropic grid. But, the choice of length scale is restricted by the cut-off width. This poses a problem in the SGS models.

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