Motion-dependent fluid forces acting on tube arrays in crossflow

On the unsteady-motion theory of magnetic forces for maglev

“…An experimental method has been developed to measure the unsteady fluid forces acting on a group of tubes in cross flow (Chen 1987;Chen et al 1993;Tanaka and Takahara 1982). The same technique can be applied to measure magnetic forces.…”

Helical Wave Oscillations in a Row of Cylinders in a Cross-Flow

“…The notation used is slightly different from the one used by Chen et al (1993), but they formulate the equations of motion in terms of the absolute cylinder displacements, as opposed to the relative displacements used here. The single-primed quantities ( , , , ) are the fluid-damping coefficients, and the double-primed quantities ( , , , ) are the fluid-stiffness coefficients.…”

“…Several previous studies have obtained the fluid forces on a cylinder row/array (Connors 1970;Tanaka & Takahara 1980;Price & Paı¨doussis 1984;Chen et al 1993). In this study, the direct coupling coefficients were measured by using the ARMA process and the cross-coupling coefficients were determined through heuristic fits based on instability mechanisms.…”

“…A number of experimental and analytical studies have been carried out to understand the dynamics of cylinders in a uniform cross-flow (Roberts 1966;Connors 1970;Blevins 1977;Chen 1978Chen , 1983Chen , 1987Tanaka & Takahara 1980;Lever & Weaver 1982;Paı¨doussis et al 1985;Paı¨doussis & Price 1988;Chen et al 1993). Price (1995) provides an extensive review of all the models of fluidelastic instability for cylinder arrays in cross-flow.…”

Nonlinear dynamics of a stack/cable system

“…a, a', and a" are the added-mass, fluid-damping, and fluid-stiffness coefficients, respectively. All of the fluid-force coefficients are based on experimental data (Chen et al 1993 and1995). Figure 5 shows typical experimental data of fluid-damping and fluid-stiffness coefficients vs. reduced flow velocity.…”