%0 Journal Article
%T Numerical investigation of vortex
%A Niaz Bahadur Khan
%A Zainah Ibrahim
%J Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment
%@ 2041-3084
%D 2019
%R 10.1177/1475090217751992
%X This study presents numerical investigation for flow around cylinder at Reynolds numberˋ=ˋ104 using different turbulent models. Numerical simulations have been conducted for fixed cylinder case at Reynolds numberˋ=ˋ104 and for cylinder free to oscillate in cross-flow direction, at Reynolds number O (104), mass每damping ratioˋ=ˋ0.011 and range of frequency ratio wtˋ=ˋ0.4每1.4 using two-dimensional Reynolds-averaged Navier每Stokes equations. In the literature, the study has been conducted using detached eddy simulation, large eddy simulation and direct numerical simulation which are comparatively expensive in terms of computational cost. This study utilizes the Reynolds-averaged Navier每Stokes shear stress transport k-肋 and realizable k-汍 models to investigate the flow around fixed cylinder and flow around cylinder constrained to oscillate in cross-flow direction only. Hydrodynamic coefficients, vortex mode shape and maximum amplitude (Ay/D) extracted from this study are compared with detached eddy simulation, large eddy simulation and direct numerical simulation results. Results obtained using two-dimensional Reynolds-averaged Navier每Stokes shear stress transport k-肋 model are encouraging, while realizable k-汍 model is unable to capture the entire response branches. In addition, broad range of ※lock-in§ region is observed due to delay in capturing the transition from upper to lower branch during two-dimensional realizable k-汍 analyses
%K Numerical simulations
%K Reynolds-averaged Navier每Stokes shear stress transport k-肋
%K flow around cylinder
%K vortex-induced vibration
%K high Reynolds number
%K low mass ratio
%U https://journals.sagepub.com/doi/full/10.1177/1475090217751992