ATMOSPHERIC MODELS FOR USE IN HYDRODYNAMIC COMPUTER CODES
Technical rept. 1 Aug-1 Sep 1964
AIR FORCE WEAPONS LAB KIRTLAND AFB NM
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A hydrostatically stable atmospheric model is necessary to perform theoretical calculations of hydrodynamic motion in the atmosphere, on a digital computer. This report presents three such models developed at the Air Force Weapons Laboratory for use in its hydrodynamic computer codes. One is for the annual mean temperate atmosphere 45 deg N latitude one for the annual mean tropical atmosphere 15 deg N latitude and one for the summer subarctic atmosphere 60 deg N latitude. The models are presented herein in tabular form and as FORTRAN subroutines which could be placed directly into any hydrodynamic computer code. For a given altitude cm, the subroutines return a pressure dynessq cm, density gmscu cm, specific internal energy ergsgm, temperature degrees K, and gamma - 1. The pressures and densities agree with tabulated values to at least 1 part in 10 to the 8th power and temperatures to at least 1 part in 100. The atmospheres experience an acceleration of no more than 3 parts in 1000 in a first order finite difference scheme with a zone size of 1 kilometer, the worst case.
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