Numerical simulation of hydrodynamics and heat transfer under conditions of turbulent transverse flow past a “trench” on a plane surface

Results are given of numerical simulation of hydrodynamics and heat transfer under conditions of transverse flow past a two-dimensional “trench” (a groove whose cross section has the form of a segment of circle) located on a plane isothermal surface. The calculations are performed for an incompressible liquid within two-dimensional Reynolds equations closed with the aid of the Menter and Spalart–Allmares turbulence models using multiblock overlapping grids. Detailed analysis is performed of the effect of the trench depth on the flow structure (configuration of separated-flow regions) and on the distribution of friction, pressure, and heat fluxes along the surface subjected to flow.