نتایج جستجو برای: pulsatile flow darcy forchhmeir model
تعداد نتایج: 2491466 فیلتر نتایج به سال:
This paper presents an immersed phase field model designed to predict the fracture-induced flow due brittle fracture in vuggy porous media. Due multiscale nature of pores material, crack growth may connect previously isolated pores, which leads conduits. mechanism has important implications for many applications such as disposal carbon dioxide and radioactive materials hydraulic mining. To unde...
OBJECTIVES We hypothesized that recognition of systolic flow reversal (pulsatile flow) after thrombolytic administration on coronary angiography is associated with angiographic and electrocardiogram findings reflecting impaired myocardial perfusion, as well as poorer clinical outcomes. BACKGROUND Reversal of systolic flow on Doppler velocity wire recordings has been associated with impaired t...
The effects of pulsatility in blood flow on endothelium-derived nitric oxide (EDNO) release in the peripheral vasculature were investigated. The basal and flow-stimulated EDNO release were compared between pulsatile and nonpulsatile systemic flows before and after the administration of NO synthase inhibitor N(G)-monomethyl-L-arginine (L-NMMA). Peripheral vascular resistance (PVR) was significan...
CFD modelling is a powerful, but largely under-utilised tool for biomedical applications. In particular, it has great potential for helping us better understand the mechanisms responsible for cardiovascular disease such as artherosclerosis and thrombi formation. Flow behaviour in blood vessels has been shown to depend strongly on features of the local geometry such as branching, bending, and re...
In quantitative ultrasonic flow measurements, the beam-to-flow angle (i.e., Doppler angle) is an important parameter. An autoregressive (AR) spectral analysis technique in combination with the Doppler spectrum broadening effect was previously proposed to estimate the Doppler angle. Since only a limited number of flow samples are used, real-time two-dimensional Doppler angle estimation is possib...
the purpose of this research is to numerically investigate the interaction of pulsatile flow of blood with an axisymmetric artery in various percentages of stenosis. the carreau non-newtonian model and the generalized maxwell rheological model were used to model the blood fluid and the viscoelastic wall of arterial, respectively. the innovation of the present research is modeling of viscoelasti...
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