نتایج جستجو برای: flow velocity

تعداد نتایج: 589489  

The fall velocity of sediment particles plays a key role in sediment transport studies. Researchers have attempted to determine the terminal fall velocity, and most of the studies in this regard have been based on experimental, quasi-experimental, and in-situ measurements. The present study aimed to use a numerical model to estimate the fall velocity of a single sediment particle in distilled a...

Journal: :geopersia 2013
mahdi rastegarnia ali kadkhodaie-ilkhchi

accurate permeability estimation has always been a concern in determining flow units, assigning appropriate capillary pressure andrelative permeability curves to reservoir rock types, geological modeling, and dynamic simulation.acoustic method can be used as analternative and effective tool for permeability determination. in this study, a four-step approach is proposed for permeability estimati...

Journal: :Circulation. Cardiovascular interventions 2015
Sukhjinder S Nijjer Ricardo Petraco Tim P van de Hoef Sayan Sen Martijn A van Lavieren Rodney A Foale Martijn Meuwissen Christopher Broyd Mauro Echavarria-Pinto Rasha Al-Lamee Nicolas Foin Amarjit Sethi Iqbal S Malik Ghada W Mikhail Alun D Hughes Jamil Mayet Darrel P Francis Carlo Di Mario Javier Escaned Jan J Piek Justin E Davies

BACKGROUND Percutaneous coronary intervention (PCI) aims to increase coronary blood flow by relieving epicardial obstruction. However, no study has objectively confirmed this and assessed changes in flow over different phases of the cardiac cycle. We quantified the change in resting and hyperemic flow velocity after PCI in stenoses defined physiologically by fractional flow reserve and other pa...

Journal: :Journal of Ultrasound in Medicine 2010

Journal: :Journal of the Japan Society of Precision Engineering 1959

Journal: :IEEE Transactions on Molecular, Biological and Multi-Scale Communications 2020

When depth of flow past a river bridge exceeds opening under the bridge, the flow under the bridge becomes pressurized. The water is directed downward and under the bridge deck, causing increase in velocity and shear stress on the bed thereby increasing bed scour. This is termed as Pressure Flow Scour. The present study investigates the phenomenon of pressure flow scour resulting from a submerg...

ژورنال: توانبخشی 2013

Objective: Assuming that cardiac rehabilitation and exercise significantly reduces mortality rate in coronary artery disease and has an important role in secondary prevention, the purpose of this study is to assess the effects of strength training and cardiac rehabilitation programs on biomechanical parameters of blood flow velocity and blood flow rate and these relationships with the brachial ...

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