A mixed semi-analytical cum numerical approach is presented in this paper which accounts for the coupled mechanical and electrical response of piezoelectric, functionally graded (FG) and layered composite hollow circular cylinders of finite length. Under axisymmetric mechanical and electrical loadings, the three-dimensional problem (3D) gets reduced to a two-dimensional (2D) plane strain proble...

Many microorganisms swim in a highly heterogeneous environment with obstacles such as fibers or polymers. To better understand how this environment affects microorganism swimming, we study propulsion of a cylinder or filament in a fluid with a sparse, stationary network of obstructions modeled by the Brinkman equation. The mathematical analysis of swimming speeds is investigated by studying an ...

Rotating cylinders have wide applications in different areas, especially the aerodynamic area. However, the acoustic behaviors of these components have not been widely studied. The generating noise from a spinning cylinder is mainly due to the detached vortices from the leeward of the body. In this study, the large eddy simulation technique is used to simulate the flow field over a three-dimens...

Abstract—This paper presents new semi-analytical expressions to calculate the self-inductance and the electromagnetic force for a ferromagnetic cylinder of finite length placed inside a circular coil of rectangular cross section. The proposed analytical model is based on boundary value problems with Fourier analysis. Laplace’s and Poisson’s equations are solved in each region by using the separ...

Electrophoresis of a tightly fitting sphere radius $a$ along the centreline liquid-filled circular cylinder $R$ is studied for gap width $h_0=R-a\ll a$ . We assume Debye length $\kappa ^{-1}\ll h_0$ , so that surface conductivity negligible zeta potentials typically seen in experiments, and Smoluchowski slip velocity imposed as boundary condition at solid surfaces. The pressure difference betwe...

Aerodynamic forces acting on railway vehicles depend not only the shape of but also types infrastructure. In this study, leading car a train is simplified as finite-length square cylinder; and middle an infinite-length cylinder. We conducted large-eddy simulations (LES) flow around vehicle model flat ground, embankment viaducts. The LES results confirm that side force coefficients models change...