Large eddy simulation of a thermal impinging jet using the lattice Boltzmann method

A compressible Hybrid Lattice Boltzmann Method solver is used to perform a wall-resolved Large eddy simulation of an isothermal axisymmetric jet issuing from pipe and impinging on heated flat plate at Reynolds number 23 000, Mach 0.1, impingement distance two diameters. The flow field statistics, Nusselt profile (including the secondary peak), shear stress were well reproduced. azimuthal coherence primary vortical structures was relatively low, leading no discernible temporal periodicity azimuthally averaged location peak. While local unsteady near-wall separation observed in wall jet, this did not exhibit found be only cause thermal spots blue, which lead peak number, as stream-wise oriented also played significant role increasing heat transfer.