B225 湿潤過程を含む保存型非静力学モデルの差分スキーム

概要

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A conservative scheme for the compressible nonhydrostatic models including moist processes is formulated. The scheme is based on the flux form equations of total density, momentum, internal energy, and densities of water substance. Only the warm rain cloud process is included for cloud physics. As an quantitative improvement, we use more accurate formulas for the thermodynamics of the moist atmosphere by taking account of the effects of specific heats of water substances and the temperature dependency of latent heat. These effects are generally neglected in most numerical models. Using the squall-line experiments, we diagnose the water budget and the energy budget and find that conservations of water and total energy are well satisfied. If the accurate moist thermodynamics are used, the total rain is reduced more than 10% in comparison to the case when the simplified thermodynamics are used.
日本流体力学会の論文
2002-07-23