Boundary Conditions for Simulating Karman Vortices Using the MPS Method

New boundary conditions to simulate the Karman vortices were developed for the Moving Particle Semi-implicit (MPS) method. These boundary conditions enable us to analyze the wake region of a cylinder without an unnatural cavity observed in past analyses. Karman vortices that were present behind a circular cylinder and a square cylinder in flows were successfully simulated in two dimensions using the MPS method with the developed boundary conditions. The simulated drag coefficients and Strouhal numbers were close to those of the finite difference method and experiments.

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