Abstract In order to meet the capability requirements of submarine radiated noise acoustic field prediction in free and improve detection anti-detection capabilities, this paper proposes an method based on geometric average theory field. According measured self-noise information, a global search is used. By calculating energy spherical, extended compensation for different point distances achiev...

in this research ideal magnetohydrodynamics equations (mhd) has been solved in a channel of quasi one dimensional plasma flow. magnetohydrodynamics equations, including continuity, momentum, energy and induced magnetic field equations are with the respect of the gauss magnetic condition. the implemented numerical solution is based on harten, lax, vanleer (hlld) discontinuities solution methods....

Abstract For welding temperature field, stress and strain field in fillet joints, using the double ellipsoid heat source, ABAQUS software platform is used to simulate analyze process of joints with four different application sequences. By setting up observation points, study analyzed distribution simulated for these cases. The results show that vertical weld direction, sequence has a large effe...

Flash sintering is one of the newest techniques for sintering ceramics to near full density. It occurs in an appropriate combination of temperature and electric field. Temperature measurement is one of the most serious challenges in this process. In the present study, we tried to model a flash sintering process of 8YSZ and 3YSZ with finite element method to make an assessment for temperature di...

according to the temperature distribution of water injection well-bore in highly deviated wells under different conditions and unstable temperature field heat conduction principles, a true three-dimensional model was established to analyze the law of variation on temperature of highly deviated wells during the water injection process, and to analyze the factors that influence the water injectio...

the narrow operating window between pore pressure and fracture pressure makes drilling difficult in some operations. a feasibility study of managed pressure drilling (mpd) is carried out on iran darquain oil field. the previous wells drilled in this field showed that mud returns were lost during drilling gadvan formation. the present work addresses this problem by means of surface back pressure...