Browsing Engineering by Title
Now showing items 2237-2256 of 3388
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Numerical modelling of fluid flow through porous media-thermal storage application
(Wichita State University, 2017-12)In this paper computational fluid dynamics technology is utilized to predict the flow and heat transfer for the porous medium. The porosity, particle diameter of three types of graphite are studied to observe the heat ... -
Numerical simulation and experimental comparison of the R12, R22 and R134a flow inside straight and coiled helical capillary tubes
(© Springer International Publishing AG, Part of Springer Science+Business Media, 2016-03)This paper presents a numerical simulation for adiabatic condition of the R12, R22 and R134a flow through straight and helically capillary tubes and also an experimental investigation of the R134a flow inside straight and ... -
Numerical simulation of blood flow in arterial stenosis under steady and pulsatile flow conditions
(Wichita State University, 2011-05)Cardiovascular diseases (CVDs) are among the leading causes of death in the world. In this study, an attempt was made to model the flow dynamics of blood in abnormally narrowed artery. Finite volume solver FLUENT was ... -
Numerical simulation of fluid-structure interaction for tilting-disk mechanical heart valves
(Wichita State University, 2013-05)According to the United States Department of Health and Human Services, 27.1 million non-institutionalized adults were diagnosed with heart disease in 2010. The number of deaths associated with heart disease in 2009 was ... -
Numerical simulation of heat transfer in cryoprobe
(Wichita State University. Graduate School, 2010-04-23)Computational Fluid dynamics (CFD) analysis was used to evaluate the heat transfer performance during the freezing process in cryotherapy. Cryoprobes are generally used for the treatment of diseased tissue in cryotherapy. ... -
Numerical simulation of pulsatile blood flow across a tilting–disk mechanical heart valve
(Wichita State University, 2007-07)To overcome several clinical challenges involving mechanical heart valves, accurate numerical simulation of blood flow through these devices has been of interest. Since heart disease is the leading cause of death around ... -
Numerical simulation of steady and pulsatile flow in stenosed tapered artery and abdominal aortic aneurysm using κ-ω model
(Wichita State University, 2010-12)The effect of hemodynamics on cardiovascular disease (CVD) is very important since CVD is the number one killer nationwide and around the globe. Coronary artery disease (CAD), also called arteriosclerosis, is a common ... -
Numerical simulation of the leaflet designs to improve hemodynamics of mechanical heart valves
(Wichita State University, 2017-07)Mechanical heart valves (MHVs) are widely implanted due to their reliability and long life span. However, patients who receive MHV implants are required and prescribed anticoagulant medication to reduce the high risk of ... -
Numerical simulation of turbulent flow inside the cylinder of a new two-stroke grail engine design
(Wichita State University, 2015-05)This work presents a novel way of implementing Autodesk computational fluid dynamics (CFD) software for internal combustion (IC) engine application. The main objective of this research is to develop a high fidelity simulation ... -
Numerical simulation of wall-pressure fluctuations due to a turbulent boundary layer
(AMER INST AERONAUT ASTRONAUT, 2012)In this investigation, wall-pressure fluctuations due to a turbulent boundary layer are estimated by various numerical methods. Four different turbulence models, including one- and two-equation models and a recently developed ... -
Numerical simulation of wall-pressure fluctuations due to turbulent boundary layer
(Wichita State University, 2011-12)Pressure fluctuations associated with turbulent boundary layer have been a prominent issue over the past few decades. In order to simulate pressure fluctuations beneath a turbulent boundary layer, a numerical investigation ... -
Numerical simulations of blood flow in arteries using fluid-structure interactions
(Wichita State University, 2007-07)Cardiovascular disease (CVD) is the number one cause of death in the United States and worldwide. Among the various CVDs, coronary artery disease (CAD) is the leading cause of death among both men and women. Of the various ... -
Numerical simulations of pulsatile flow in an end-to-side anastomosis model
(Tech Science Press, 2007-03)A potential interaction between the local hemodynamics and the artery wall response has been suggested for vascular graft failure by intimal hyperplasia (IH). Among the various hemodynamic factors, wall shear stress has ... -
Numerical solution of Maxwell’s equations on transformed coordinates for non-rectangular electromagnetic applications
(Wichita State University, 2020-05)The utilization of a fourth-order Modified Runge-Kutta (MRK) scheme on a transformed coordinate system for simulating electromagnetic applications that involve non-rectangular domains are presented. The model equations ... -
Numerical study and experimental comparison of laser cutting of 1.2MM thick austenitic stainless-steel using CW Nd: YAG laser
(Wichita State University, 2020-05-01)Stainless steel-304 is the most common steel used for corrosion resistance applications, but higher melting point is a limitation in industrial manufacturing. The non-conventional and subtractive manufacturing technique ... -
Numerical study of nanoparticle concentration effect on heat transfer enhancement in mini-channel flow
(Wichita State University, 2014-12)The study conducted in this research focuses primarily on the discussion and statistical analysis of thermophysical physical properties in published literature, development of a mathematical correlation for estimating ... -
Numerical study of the occurrence of adiabatic shear banding without material failure
(Wichita State University, 2010-12)Segmented chips that arise as a result of formation of adiabatic shear bands are common in high-speed machining of harder alloys. Analytical models describing the mechanics of segmented chip formation have been developed, ... -
Numerical-based comparison among critical flow properties of HFC-134a and its new alternatives HFO-1234yf and HFO-1234ze through short-tube orifices
(American Society of Mechanical Engineers, 2015)Although HFC-134a is a common refrigerant for residential and mobile refrigeration systems, investigators are dealing with replacing it with new alternatives because of its harmful environmental and global warming effects. ... -
Numerical-based non-dimensional analysis of critical flow of R-12, R-22, and R-134a through horizontal capillary tubes
(Elsevier B.V., 2015-10)Development of correlations predicting critical mass flow rate and critical pressure distribution through capillary tubes is presented. In order to accomplish such a work, the critical mass flow rate and pressure distribution ... -
Nurse staffing and skill-mix optimization in inpatient settings using a stochastic modeling approach
(Wichita State University, 2018-07)The World Health Organization has estimated a worldwide shortage of around nine million nurses and midwives by 2030. In the United States, a shortage of registered nurses (RN)s is predicted to occur in several states by ...