Three-dimensional vorticity patterns of cylinder wakes

A Comparison of Two- and Three-dimensional Wakes of an Oscillating Circular Cylinder

Simulation and control of three-dimensional wakes

We illustrate the problem of wake optimization on two examples. In the first example, the destruction of trailing vortices, we show that stochastic optimization is a flexible tool to identify vortex systems enhancing natural instabilities. In the second example, the problem of drag reduction in a cylinder wake, a priori information on the flow dynamics is highly desirable and we give some preli...

Three-dimensional Wakes in Linearly Stratified Liquids

THREE-DIMENSIONAL WAKES IN LINEARLY STRATIFIED LIQUIDS by Philip J. Stockhausen, Charles B. Clark Submitted to the Department of Civil Engineering on May 26, 1966, in partial fulfillment of the requirements for the degree of Master of Science. The wake and the zone of turbulently mixed fluid behind a threedimensional body in a liquid with a linear density gradient were studied. The objective of...

Oscillations in cylinder wakes at Mach 4

The wake behind a circular cylinder in Mach 4 flow is examined experimentally in the Reynolds number range 2× 104 to 5× 105. Periodic oscillations of the sliplines in the wake are observed. The Strouhal number of the oscillations based on the diameter of the cylinder is found to increase monotonically from 0.30 to 0.50 with increasing Reynolds number. If the Strouhal number is formed using the ...

Particle methods for direct numerical simulations of three - dimensional wakes †

In this paper we describe recent advances in the development of particle methods for the direct numerical simulations of three-dimensional wakes. Both body-fitted and immersed boundary techniques are considered. The accuracy and numerical cost of the proposed numerical methods are discussed on the benchmark cases of a flow past a cylinder and of a vortex ring impinging on a cylinder. PACS numbe...