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Abstract: Large-eddy simulation (LES) of the incompressible turbulent flow in a two-sided lid-driven cubical cavity with lids moving in anti-parallel direction has been carried out at a Reynolds number of 12,000. The transient behaviour of the corner eddies have been discussed on the statistically symmetric plane. Time averaged solutions have been obtained by performing a long-lasting simulations using multiprocessing. The presence of four more eddies except the well known two corner eddies have been found in the transverse plane of the main core flow direction. The extent of the main average recirculating flow in the central core region in the x–z and y–z plane has been reported. The specific features of turbulent flow inside the cavity such as inhomogeneity of turbulence, small-scales localisation, second order turbulent statistics, cross-correlation of vorticity component and coherent structure of flow have been investigated. [Copyright &y& Elsevier]

Abstract: Large-eddy simulation (LES) using the dynamic Smagorinsky model (DSM) of incompressible turbulent flow in a lid-driven cubical cavity with lids moving in anti-parallel direction has been carried out at a Reynolds number of 12000. The time history and power spectra of variables such as velocity components, turbulent production, turbulent kinetic energy have been reported for the maximum turbulent production zone. The distribution about the size of turbulent structure passing through the maximum turbulent production zone has been discussed. The shearing and the swirling structures are identified on statistically symmetric plane. The turbulent production and dissipation have been investigated at each impingement area in the averaged flow field. [Copyright &y& Elsevier]

A dimensionless numerical investigation of turbulent flow and heat transfer characteristics due to the impingement of a free inclined slot jet onto the moving hot surface has been performed using the k − ω turbulence model. The parameters considered for the investigation are: the Reynolds number, impingement angle and plate velocity. The influence of parameters on the properties such as the pressure and velocity profiles, skin-friction coefficients, Nusselt number, interface temperature, and the location of stagnation has been presented. The displacement of stagnation point depends primarily on ϕ , whereas the effect of plate velocity is less significant. These relocations are found in between X = − 2 to 0. The effect of plate velocity on average skin-friction coefficient is continuously decreasing with increase in jet angle. A continuous increase in average Nu has been found with increase in Re for all values of ϕ and U p considered in the present study. It is revealed that the change in plate velocity has more influence on the average Nu for lower angles of impingement. Further reduction in the impingement angle shows an adverse effect on the average Nu. Correlations have been developed for Nusselt number at different zones based on the parameters considered for the study. [ABSTRACT FROM AUTHOR]