This paper presents a new method for simulating ship airwake flow fields. These flows are inherently unsteady, and very difficult to predict. The method presented (NLDE) is fourth-order accurate in space and time. In this method we first solve for the steady state flow field, then we solve for the unsteady fluctuations. Steady and unsteady results are presented for a generic frigate shape. Cons...

The factors controlling the spatiotemporally varying deformation patterns in Tibet, a prolonged period (∼50 to 19 ± 3 Ma) of NNE-SSW shortening, accompanied by eastward flow and orogen-parallel extension later stage (19 Ma present-day), are still poorly constrained. Using viscous models, we performed scaled laboratory experiments with steady unsteady state collision kinematics address this issu...

A variable sensitivity displacement interferometer ~VSDI! used to monitor both normal and in-plane particle displacements in stress wave propagation experiments is introduced. The general system consists of two interferometers working in tandem. Normally reflected light is interfered with each of two symmetrically diffracted light beams generated by the specimen rear surface. In cases where the...

In order to study the matching characteristics of positive displacement air compressor and PEMFC (proton exchange membrane fuel cells), supply subsystem, basic operating performance parameters scroll single-screw compressors were analyzed with focus on oil-free double-wrap compressor. According thermodynamic model three-dimensional unsteady-state numerical simulation, variation temperature, pre...

An implicit unsteady upwind solver including a mesh motion approach was applied to simulate a helicopter including body, main rotor and tail rotor in hover flight. The discretization was based on a second order finite volume approach with fluxes given by the Roeand#39;s scheme. Discretization of Geometric Conservation Laws (GCL) was devised in such a way that the three-dimensional flows on arbi...