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

“…8a) and maximal values of the turbulent energy being generated (~0.03) and eddy viscosity (~0.0023) are reached, as well as a maximum of relative intensity of heat transfer in the wake behind the trench (of the order of 40% with a 12% rise of the relative drag of the selected region). This level of enhancement of heat transfer agrees well with the numerical results obtained for a spherical dimple [14]. 1.20 With a still further deepening of the trench, the flow pattern exhibits no qualitative changes.…”

“…For example, a numerical study was made in [10,11] of a two-dimensional turbulent flow in plane-parallel and diverging channels with a circular trench which accommodates a rotating cylinder (one of the options of the active convection cell in [12]). Calculations of three-dimensional flow past a spherical dimple on a plane wall and on the wall of a narrow channel were performed in [13,14].…”

“…The difference equations are solved by the Stone method of incomplete matrix factorization (SIP) (see [14]). In the process of global iterations when solving momentum equations, several iterations are performed per single local iteration in the block of calculation of the pressure correction and a limited number of iterations are performed in the block of calculation of the turbulent characteristics of flow.…”

Going against the flow—A review of non-additive means of drag reduction

“…However, unlike riblets which form a series of continuous streamwise grooves protruding from the wall, dimples are discrete shallow indentations in the walls and the spacing and arrangement of these dimples differ from one study to another. The vast bodies of literature on dimples have primarily focused on heat transfer [91][92][93][94][95][96][97][98][99][100][101] but there are those who have suggested dimples as a viable option for drag reduction as well [102][103][104][105][106][107]. However, studies attempting to prove the feasibility of dimples for DR are generally multi-objective studies where heat transfer optimization is a primary goal.…”

Numerical Simulation of Unsteady-State Heat Transfer under Conditions of Laminar Transverse Flow past a Circular Cylinder

“…In addition to linearized approach, the high efficiency of the procedure is provided by the choice of the method of incomplete matrix factorization in Stone's version of strongly implicit procedure [19].…”