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Parametric investigation of spatio-temporal variability of submerged body hydrodynamics
Abstract The spatio-temporal dynamics of the flow around a wall-mounted bluff body immersed in a turbulent boundary layer is investigated numerically, on a 2D vertical plane using ANSYS-Fluent, over a wide parameter ranges. The submergence ratios () considered for the study are 1.5–10, that covers the entire regime of low, intermediate, and high . The Reynolds numbers () considered are , that falls within the turbulent regime. The steady and fluctuating flow fields are investigated as a response to varying and . It is demonstrated that in the Reynolds numbers range considered, there exists an optimum up to which normalized mean reattachment length is proportionate to and beyond that optimum value, normalized mean reattachment length is inversely proportionate to . In general, the maximum reattachment length over the entire range considered, does not show any coherent variability with . Maxima and minima of the normalized mean velocity fields are found to be inveresly proportionate to (with varying degree) and independent of . The skin friction coefficient, is proportional to and inversely proportional to on all three edges of the obstacle. The maximum Reynolds shear stress seems to occur approximately at the reattachment point. The general observation is: the time-averaged kinematic fields are asymmetrically more influenced by over , whereas time dependent fluctuating fields show much higher dependence on compared to .
Parametric investigation of spatio-temporal variability of submerged body hydrodynamics
Abstract The spatio-temporal dynamics of the flow around a wall-mounted bluff body immersed in a turbulent boundary layer is investigated numerically, on a 2D vertical plane using ANSYS-Fluent, over a wide parameter ranges. The submergence ratios () considered for the study are 1.5–10, that covers the entire regime of low, intermediate, and high . The Reynolds numbers () considered are , that falls within the turbulent regime. The steady and fluctuating flow fields are investigated as a response to varying and . It is demonstrated that in the Reynolds numbers range considered, there exists an optimum up to which normalized mean reattachment length is proportionate to and beyond that optimum value, normalized mean reattachment length is inversely proportionate to . In general, the maximum reattachment length over the entire range considered, does not show any coherent variability with . Maxima and minima of the normalized mean velocity fields are found to be inveresly proportionate to (with varying degree) and independent of . The skin friction coefficient, is proportional to and inversely proportional to on all three edges of the obstacle. The maximum Reynolds shear stress seems to occur approximately at the reattachment point. The general observation is: the time-averaged kinematic fields are asymmetrically more influenced by over , whereas time dependent fluctuating fields show much higher dependence on compared to .
Parametric investigation of spatio-temporal variability of submerged body hydrodynamics
Banerjee, Ayan Kumar (author) / Singh, Santosh Kumar (author)
Applied Ocean Research ; 123
2022-03-22
Article (Journal)
Electronic Resource
English
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