Sieve trays are widely used in the gas- liquid contactors such as distillation and absorption towers. In this article, a three-dimensional, two phase CFD model using Euler-Euler framework was developed to simulate a distillation tower with two sieve trays. Hydrodynamic simulation of air and water system in different rates of gas phase was carried out and velocity distribution parameters, clear ...

When two ships are operating in proximity, the resulting hydrodynamic forces can cause significant loads on the ships. Such problems can be solved by a numerical approach, based on the use of a three-dimensional panel method. The objective of this paper is to compute the case of two ships which are allowed to move under the influence of the hydrodynamic forces. In this problem, the direct evalu...

We have developed a hybrid cosmological code to probe the baryonic gas dynamics of large cosmological structures. An adiabatic simulation of large scale structure formation has been performed, using initial conditions speci ed by the cold dark matter (CDM) power spectrum normalized to the COBE detection. A baryon fraction of 0:06 is adopted and the simulation follows an 85h 1 Mpc box with 25 mi...

We examine the hydrodynamics of a granular gas using numerical simulation. We demonstrate the appearance of shearing and clustering instabilities predicted by linear stability analysis, and show that their appearance is directly related to the inelasticity of collisions in the material. We discuss the rate at which these instabilities arise and the manner in which clusters grow and merge.

A new formulation employing the Galerkin/least-squares finite element method is presented for the simulation of the hydrodynamic model of semiconductor devices. Numerical simulations are performed on the coupled Poisson and hydrodynamic equations for one carrier devices. The hydrodynamic equations for a single carrier, i.e. for the electrons or holes, resemble the compressible Navier-Stokes equ...

This paper presents a method for solving the 3-D hydrodynamic (HD) model in submicron semiconductor devices. The main features of this method aTe the fairly low memory and CPU time requirements, and excellent convergent property. Simulation results of a 3-D submicron MOSFET are provided.

Sieve trays are widely used in the gas- liquid contactors such as distillation and absorption towers. In this article, a three-dimensional, two phase CFD model using Euler-Euler framework was developed to simulate a distillation tower with two sieve trays. Hydrodynamic simulation of air and water system in different rates of gas phase was carried out and velocity distribution parameters, clear ...

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A finite difference upwind discretization scheme in two dimensions is presented in detail for the transient simulation of the highly coupled non-linear partial differential equations of the full hydrodynamic model, providing thereby a practical engineering tool for improved charge carrier transport simulations at high electric fields and frequencies. The discretization scheme preserves the cons...

Hydrodynamic model simulations of a steady-state electron shock wave in a 1-pm Si semiconductor device at 77 K are compared with a Monte Carlo simulation of the Boltzmann equation using the DAMOCLES program. Excellent agreement between the two different methods for simulating the electron shock wave can be obtained by adjusting the amount of heat conduction in the hydrodynamic model.