<title>Two-dimensional computer modeling of discharge-excited CO gas flow</title>

Abstract

In order to simulate and predict the complex mechanism of the high power CO laser excited by transverse dc discharge, a two-dimensional gas flow model has been developed from the authors' one-dimensional model. Based on the control volume method for two-dimensional Cartesian coordinates, the fundamental equations deal with state, continuity, momentum, energy, and reactions. The similar discharge power distribution can be given as the experiment, where the power density is higher around the hollow-cathode array than around the plane anode. Although the speed of the CO gas mixture is in the sub-sonic region, the effect of compression is taken into account. The integration is repeated by SIMPLEST method and the matrices are solved by MICCG method for the pressure equation and by MJLUCR method for the other equations. The computation is carried out by a HITAC S820 supercomputer and a Sun-4 workstation. As a result of the simulation, non-uniform distribution of the gas parameters was made clear.

One-D and two-D computer models of industrial CO laser

“…For the typical gas mixture ratio of COfN/He/O2 = 6/16178/0.05, the following V-V and V-RTF processes are dominanL CO(v) + CO(w-1) -> CO(v-1) + CO(w) ( 1 <v < w, -ih > 0 ) , (5) N2(v) + N2(w-1) 4 N2(v-1) + N2(w) [ 1 < v < w, -\h > 0 ), (6) CO(v) + N2(w-1) -* CO(v-1) + N2(w) ( 1 < v < w ), …”

Simulation code of high power discharge for iPhones

“…The authors developed the numerical simulation codes for high power discharge excited CO lasers since 1982 [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] . At first, large-scaled computer, so called "mainframe" was used for calculation.…”

Mutual utilization of simulation for high power application in the cloud computing environment

“…In order to analyze and predict the experiments., a variety of numerical simulation codes were developed [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] . In recent ten years, the number of systems and users of cloud computing has been increasing.…”