Shaw, Keefer, Refsdsl and others (1) have shown that goopotential height is represented on the tcphigrani by an area, and that an isentropic at'mosphere XY (figure l), equal in geopotential height to a given atmosphe,re AB, may be const8ruct8ed by so placing the line XY on the tepliigram t,hat the area XAZ is equal to the area YBZ. The effect of moistmure is normally negligible, but may be allo...

We investigated to what extent the isentropic, non-geostrophic formulation of zonally averaged circulation derived for stratospheric conditions is applicable to climatological transport in the extratropical troposphere and lower stratosphere. The study is based on 10 years of daily data of ECMWF analysis and on the ECHAM3 climate model of the German Climate Computing Centre. The main result is ...

This paper proves the existence of variational rotating solutions to compressible non-isentropic Euler-Poisson equations with prescribed total mass. extends result isentropic case (see Auchmuty and Beals (1971)) case. Compared previous in Wu (2015)), keep constraint finite mass, we establish a new structure equations.

This paper describes an experimental study carried out on a refrigeration scroll compressor with and without vapour injection. The test rig designed for that purposed allows evaluating the performance over a wide range of operating conditions, by varying the supply pressure, the injection pressure, the discharge pressure, the supply superheating and the injection superheating. 97 Steady-state p...

5 The sensitivities of the Brewer-Dobson Circulation (BDC) to different distributions of trop6 ical SST heating are investigated in an idealized aqua-planet model. It is found that an 7 increase in tropical SSTs generally leads to an acceleration of tropical upwelling and an as8 sociated reduction in the Age of Air (AOA) in the polar stratosphere, and that the AOA 9 near the subtropical tropopa...

We construct spherical, hydrostatic models of dense molecular cores and Bok globules consisting of two distinct, spatially separate gas components: a central, isothermal region surrounded by a negative-index, polytropic envelope. The clouds are supported against their own self-gravity by a combination of thermal, mean magnetic, and turbulent wave pressure. The latter two are included by allowin...

extension of the previous work, A fast and accurate numerical method for solving the three-dimensional Euler equations is applied to cascade calculation. Test cases of a VKI turbine cascade and a low pressure turbine cascade are presented. Results of isentropic Mach number distributions on blade surfaces show good agreements with experimental data a t design conditions, while discrepancy exists...

Original scientific paper The paper presents the possibility of electricity generation at the pressure reduction stations (PRS) in the conventional system of natural gas transmission and distribution. The main deficiency of the conventional system is its thermodynamic irreversibility, i.e. the loss of potential work that could be generated while reducing the gas pressure. Within the first part ...

The compact direct flux reconstruction method (CDFR) for conservation laws utilizes techniques from compact finite difference methods to directly approximate spatial derivatives of fluxes within standard elements. The CDFR scheme is a compact high-order method family which can be efficiently parallelized for high performance computing. In the present study, a parallel performance study of the 3...

We prove that isentropic gas flow does not admit non-degenerate TVD fields on any invariant set M(r0, s0) = {r0 < r < s < s0}, where r, s are Riemann coordinates. A TVD field refers to a scalar field whose spatial variation VarX(φ(τ(t,X), u(t,X))) is nonincreasing in time along entropic solutions. The result is established under the assumption that the Riemann problem defined by an overtaking s...