Figure 4 - uploaded by Dmitry A. Lysenko
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Unstructured triangular mesh (a) and 40 equally spaced contours of log density (b). 2D computational domain is chosen in such a way to replicate the conditions of TST-27 wind tunnel (Figure 4a). The length and the width of domain are: 1 m and 0.27 m, respectively. The wedge-plate bluff body is placed at the distance of 0.3 m from the inlet (left) boundary. The unstructured triangular mesh with total number cells of 171 K (~ 90K nodes) is used. The size of elements for bluff-body walls is chosen as 0.5 mm. Outer domain boundaries are meshed with the element's size of ~7 mm with the purpose to provide the smooth transition in the grid cell sizes. The viscous structured sublayer is applied also to the walls of the wedge-plate body (first row size-0.01 mm, growth factor-1.5 and number of rows-6). Thus the maximum Y+ value is received as 8.83. The general view of the computational domain with triangular grid is presented on Figure 4a.
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Four state-of-the-art applications of unstructured tetrahedral meshes (both static and dynamic- adaptive) in numerical simulations of different fluid dynamics phenomena are presented. The numerical methods are varied form simple Euler equations through unsteady Reynolds averaged equations to filtered Navie-Stokes equations. Meshes practically of al...
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... of the gas, such as heat capacity and viscosity are modeled using functional dependences of temperature 8 (polynomial and Sutherland laws, respectively). Figure 4b. The more detailed flow visualization near the bluff- body is presented in Figure 5. Schlieren image obtained in experiment (Figure 5a) is compared to numerically predicted density field (Figure 5b). ...
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