Experiment on a one-way flow of a rarefied gas through a straight circular pipe without average temperature and pressure gradients

Radiative heat transfer in a real case showing high temperature and pressure gradients is calculated with a global model (SLW) with and without re-scaling of the absorption coefficients to the local conditions. Changes in radiative heat flux to the walls for different reference temperatures and reference pressures are studied. Changes in reference pressure are shown to have a small influence compared to changes in reference temperature, except if the pressure is less than 10 bars for a high-pressure case. The use of the scaling does decrease the dependency on the reference condition. The highest differences obtained with strong reference temperature or pressure changes (800K and 30.105 Pa) are of about 15% and 7% respectively. For smaller changes, an uncertainty of 5% could be assumed.

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Diurnal Cycle of Thermally Driven Cross-Basin Winds in Arizona’s Meteor Crater

Journal of Applied Meteorology and Climatology ◽

10.1175/2010jamc2520.1 ◽

2011 ◽

Vol 50 (3) ◽

pp. 729-744 ◽

Cited By ~ 8

Author(s):

Manuela Lehner ◽

C. David Whiteman ◽

Sebastian W. Hoch

Keyword(s):

Diurnal Cycle ◽

Inversion Layer ◽

Crater Floor ◽

Pressure Gradients ◽

Pressure Measurements ◽

Westerly Winds ◽

Thermally Driven ◽

Temperature And Pressure ◽

The Cross

Abstract Cross-basin winds produced by asymmetric insolation of the crater sidewalls occur in Arizona’s Meteor Crater on days with weak background winds. The diurnal cycle of the cross-basin winds is analyzed together with radiation, temperature, and pressure measurements at the crater sidewalls for a 1-month period. The asymmetric irradiation causes horizontal temperature and pressure gradients across the crater basin that drive the cross-basin winds near the crater floor. The horizontal temperature and pressure gradients and wind directions change as the sun moves across the sky, with easterly winds in the morning and westerly winds in the evening. A case study of 12 October 2006 further illustrates the obtained relation between these parameters for an individual day. The occurrence of an elevated cross-basin flow on 23 October 2006 is shown to relate to the presence of an elevated inversion layer.

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Flow of liquid He II under large temperature and pressure gradients

Annals of Physics ◽

10.1016/0003-4916(63)90225-2 ◽

1963 ◽

Vol 21 (1) ◽

pp. 72-98 ◽

Cited By ~ 14

Author(s):

P.P Craig ◽

W.E Keller ◽

E.F Hammel

Keyword(s):

Large Temperature ◽

Pressure Gradients ◽

Temperature And Pressure

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The Simulation of the Launching Process on Concentration Water Injection Launcher

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.419.186 ◽

2013 ◽

Vol 419 ◽

pp. 186-191

Author(s):

Xiao Fei Zhou ◽

Yi Jiang ◽

Yu Sen Niu ◽

Shao Zhen Yu

Keyword(s):

Flow Field ◽

Water Injection ◽

Calculation Model ◽

Two Phase ◽

Average Temperature ◽

Fluent Software ◽

Simulation Results ◽

Temperature And Pressure ◽

Gas Liquid Flow ◽

New Research

Simulation of the launching process in concentration water injection launcher, and get the parameter variations during the launch process, compared with traditional engineering algorithm, verify the reliability of the simulation results, given a new research method of interior ballistics on this launch system. This simulation has very important meaning for the temperature and pressure checking at the Beginning of the design. The simulation results show that,after the flow field stable,the average temperature and pressure in low-pressure chamber and the sabot are very close. This article uses the FLUENT software, use Mixture two-phase flow calculation model to solve the gas-liquid flow field, use the dynamic mesh and UDF program to simulation the flow field.

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