نتایج جستجو برای: velocity pressure

تعداد نتایج: 530938  

ژورنال: مهندسی دریا 2010
Abedi, Karim, Mostafa Gharabaghi, Ahmad Reza, Omrani, Zahra,

A pipeline is considered as shell structure so its design is based on stability concepts due to the exerted high pressure, local instability is probable to occur and so prevention of its occurrence and propagation are important subjects in its design. In this paper, dynamic buckle propagation has been modeled by 3D finite element method, results are verified with experimental tests and velocity...

NOUROOZI S., , VARDELLE A., ,

In wire arc spraying, the atomizing air pressure and applied nozzle system are important factors influencing particles characteristics and coating quality. The aim of this paper is to study how the characteristics of particles such as size, velocity and temperature are influenced by the operating conditions in wire arc spray. For that, three types of wires are tested: solid wire of stainless st...

2013
M. Emans M. Liebmann MAXIMILIAN EMANS

We explore the possibilities to accelerate simulations in computational fluid dynamics (CFD) by additional graphics processing units (GPUs). By examining some examples of stationary incompressible flows from the industrial practice we demonstrate that the potential speedup obtained by deploying GPU accelerated linear solvers alone is limited if standard segregated algorithms are used. However, ...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2010
ali reza bahramian mansour kalbasi

in the computational fluid dynamics (cfd) modeling of gas-solids two phase flow, the effect of boundary conditions play an important role in predicting the hydrodynamic characteristics of fluidized beds. in this work, the hydrodynamics of conical fluidized bed containing dried tio2 nano-agglomerates were studied both experimentally and computationally. the pressure drop was obtained by pressure...

Journal: :فیزیک زمین و فضا 0
پریسا حجت نیا دانش آموخته کارشناسی ارشد ژئوفیزیک (لرزه شناسی)، گروه فیزیک زمین، مؤسسه ژئوفیزیک دانشگاه تهران، ایران محمدعلی ریاحی دانشیار، گروه فیزیک زمین، مؤسسه ژئوفیزیک دانشگاه تهران، ایران

pore pressure is an important parameter, in exploration and production of hydrocarbon resources. lack of accurate knowledge about pore pressure, before drilling phase, leads to serious dangers in drilling process. accurate knowledge about distribution of pore pressure in a field, leads to reduce risks in drilling, improve well planning and mud weight calculations. during burial, normally pressu...

Journal: :تحقیقات مهندسی کشاورزی 0
عبداله ایمان مهر دانشجوی سابق دکتری دانشگاه تربیت مدرس برات قبادیان دانشیار دانشگاه تربیت مدرس سعید مینایی دانشیار دانشگاه تربیت مدرس محمدهادی خوش تقاضا دانشیار دانشگاه تربیت مدرس

a canola seed pneumatic conveyor was designed and constructed to convey canola seed at a 90 g/hr mass flow rate through a 58 mm diameter pipe. physical and aerodynamic properties of the canola seed that are critical to the design process were measured. system pressure drop, comprising air pressure drop and solid pressure drop and which is the most important aspect of pneumatic conveyor design, ...

ژورنال: توانبخشی 2014

Objective: Flat foot is common deformity in children that medial longitudinal arch is decreased, which if not treated in childhood may lead to pain and other problems in adulthood. Insoles and orthopedic shoes usually prescribed for treatment of flat foot in children, but the biomechanical impact of these devices is not yet clear. The purpose of this study is comparison of two conventional orth...

In this study, the pressure drop for the binary mixtures of particles differing in size and density in a pseudo-2D spouted bed was experimentally studied. A binary mixture of solid particles including sand, Gypsum, and polyurethane was used in the experimental setup. Effects of static bed height, cone angle, particles diameter, and a particles weight fraction on the bed pressure drop were e...

In this paper, the performance of nanofiltration membrane process in removing Pb(II) from aqueous solution was modeled by the pore flow-concentration polarization model. The model was fabricated based on the simultaneous resolving of Extended Nernst–Planck equation(ENP), film theory, and osmotic pressure model. The effects of various operational parameters such as the applied pressure, feed con...

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