نتایج جستجو برای: velocity conditions

تعداد نتایج: 972158  

Journal: :Experimental and Computational Multiphase Flow 2023

Abstract Pressure relief by blowdown is one of the most important measures to prevent excessive pressures in primary circuit or containment severe nuclear accidents. Pool scrubbing can significantly reduce release radioactive materials, e.g., aerosols, environment during pressure relief. The decontamination factor indicating particle retention efficiency depends, among other factors, on hydrody...

2012
Michael Loecher Steven Kecskemeti Patrick Turski Oliver Wieben

Background The velocity-to-noise ratio in 4D MR Flow acquisitions can suffer, particularly for low velocity segments, because the velocity encoding settings are adjusted to the highest velocities in the volume. Blood is essentially incompressible so vascular velocity fields should be divergence free. Therefore, any remaining divergence in an acquired 3D or 4D MR flow dataset can be assumed to o...

Journal: :آب و خاک 0
کاظم اسماعیلی بنیامین نقوی فاطمه کورش وحید جعفر یزدی

abstract weirs are the most common structures for discharge measurement in engineering research. streamline curvature, non hydrostatic pressure distribution on weir and nappe adherence to the weir lead to differences between calculated and measured discharges. thus discharge coefficient, which is the ratio of real and theoretic discharges, is usually less than unity. in circular weirs the press...

Journal: :journal of tethys 0

geological conditions of tabriz, a growing city in nw-iran, are strongly influenced by north tabriz fault (ntf). north tabriz fault is a major seismogenic fault in nw-iran. so, for a correct seismic microzonation, shear wave velocity (vs) structure in different part of city should be determined. but urban conditions, such as ambient noise due to cultural activity, restrict the general applicati...

Journal: :iranian journal of chemical engineering 0
mehran jafari hydrogen and fuel cell research laboratory, department of chemical engineering, faculty of engineering, university of kashan abdullah irankhah hydrogen and fuel cell research lab., chemical engineering dep., engineering faculty, university of kashan masoud mahmoudizadeh hydrogen and fuel cell research laboratory, department of chemical engineering, faculty of engineering, university of kashan

methanol steam reforming plays a pivotal role to produce hydrogen for fuel cell systems in a low temperature range. to accomplish higher methanol conversion and lower co production, the reaction was catalyzed by cuznfe mixed oxides. various ratios of fe and cu/zn were coprecipitated in differential method to optimize the cuznfe structure. the sample containing 45cu50zn5fe (wt. %) revealed its m...

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