An examination of Karman Vortex phenomenon has been carried out, previously -> Click The Karman Vortex Street is one of particular specifications of fluid physics at which can be investigated numerically. There are lots of experimental and numerical studies that have been carried out since it had been discovered. In this topic, I wanted to share numerical simulation results which I have carried out in accordance with experimental study of Sanjay Kumar and George Laughlin from Department of Engineering, The University of Texas at Brownsville. The researchers carried out this experimental work due to receipt effect of spinning object on Karman Vortex Street. Besides, they also detected the structure of Karman Vortex during stationary condition of circular object. The experiment had been realized with the values specified as below: Diameter of circular object: 6.35 mm Reynolds Number: 168 Working fluid: Water Three specification mentioned as above are enough to generate a numerical solution related to Karman Vortex Street. I have generated a numerical model within Ansys 16.2 commercial software (SpaceClaim, Meshing, Fluent). Consequently, a comparison between numerical and experimental result has been visualized. The photograph as below is captured by Sanjay Kumar and George Laughlin during stationary condition experiments: Verification and validation are the most important specification of a numerical study. Weather or not, a numerical study has to be examined with these two phenomena. On the contrary, simulation results might only available for a painting exhibition. What are the verification and validation ? Anyway. Results and comparisons of specified studies has been visualized as below: The pattern after circular object is mostly similar with experiments. Some of parameters could be adjusted to reduce error rate and ambiguity.
To sum up, CFD model that is generated myself is applicable (validation) in accordance with this case. Thus, it probably works in which other model through different scales.
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