BLUFF-BODIES VORTEX SHEDDING SUPRESSION BY DIRECT NUMERICAL SIMULATION

Fast numerical simulation of vortex shedding in tube arrays using a discrete vortex method

Vortex shedding may occur in tube arrays, resulting in strong excitation forces at discrete frequencies. In the past the Strouhal numbers governing vortex shedding in these systems were determined primarily by experiment. This paper presents a computationally inexpensive method of numerical simulation for the unsteady flow through a rigid normal triangular tube array which determines both the f...

Numerical Simulation of Two- Dimensional Complex Flows around Bluff Bodies Using the Immersed Boundary Method

This paper presents a two-dimensional numerical simulation of flows around different bluff bodies, at Re = 100 and 200, using the Immersed Boundary (IB) method, as a sequence of a previous work. The force density term required by the IB method is obtained with the Virtual Physical Model (VPM). Simulations were carried out for two circular cylinders of different diameter in tandem, two cylinders...

Towards Wavelet-based Adaptive Numerical Simulation of Turbulent Flow past Bluff Bodies

By combining a wavelet-based grid adaptation strategy with the Brinkman penalization technique an efficient numerical method to simulate turbulent flow past bluff bodies is obtained. The approach is very promising for the simulation of turbulent flows of scientific and engineering interest. To demonstrate the feasibility of the method some preliminary numerical experiments are conducted for flo...

Absolute Permeability Calculation by Direct Numerical Simulation in Porous Media

Simulating fluid flow at micro level is an ongoing problem. Simplified macroscopic flow models like Darcy’s law is unable to estimate fluid dynamic properties of porous media. The digital sample reconstruction by high resolution X-ray computed tomography scanning and fluid-dynamics simulation, together with the increasing power of super-computers, allow to carry out pore-scale simulations throu...

Numerical Simulation of Vortex Breakdown by the Vortex-Filament Method