In this work, we applied Chebychev spectral collocation method to analyze the unsteady two-dimensional flow of nanofluid in a porous channel through expanding or contracting walls with large injection or suction. The solutions are used to study the effects of various parameters on the flow of the nanofluid in the porous channel. From the analysis, It was established that increase in expansion r...

The term bursting refers to the structural change from a strong regular spiral motion to a weaker turbulent motion which can occur at some position along a vortex. Various observations of this phenomenon have been recorded during low-speed tunnel investigations of vortex flows generated from sharp, swept back leading edges. These reveal a sudden deceleration of fluid along the vortex axis and e...

We have previously demonstrated temporal gradients in shear stress stimulate endothelial cell proliferation, whereas spatial gradients do not. In the present study, the extracellular signal-regulated kinases 1 and 2 (ERK1/2) pathway was investigated as a possible mediator for the promitogenic effect of temporal gradients. The sudden expansion flow chamber (SEFC) model was used to differentiate ...

Surrogate models based on convolutional neural networks (CNNs) for computational fluid dynamics (CFD) simulations are investigated. In particular, the flow field inside two-dimensional channels with a sudden expansion and an obstacle is predicted using image representation of geometry as input. Generative adversarial (GANs) have been shown to excel at such image-to-image translation tasks. This...

fatty liver disease (fld) is the most prevalent form of liver disease worldwide. overnutrition can induce nonalcoholic fatty liver disease (nafld), a spectrum of conditions ranging from simple steatosis [or nonalcoholic fatty liver (nafl)] to nonalcoholic steatohepatitis and cirrhosis. some of the epidemiological and pathological studies have also suggested an association between the presence o...

The numerical analysis and performance simulation of a sudden expansion with fence viewed as a diffuser are presented in this paper. SIMPLE algorithm is used to solve two-dimensional steady differential equations for conservation of mass and momentum. The Reynolds number is in the range of 20 to 100 and fence subtended angle (FSA) between 10 ̊ to 30 ̊. The location of fence from throat varies fro...

This study presents the investigation of the local entropy generation in compressible flow through a suddenly expanding pipe. Air is used as fluid. The air enters into the pipe with a turbulent profile using 1/7 th power law. The simulations are extended to include different expansion ratios reduced gradually from 5 to 1. To determine the effects of the mass flux, φ′ ′ , the ambient heat transf...

An analysis of heat transfer in the flow of a viscous, in-compressible fluid along an infinite porous plate is presented when the plate is subjected to a transverse sinusoidal suction. The flow field becomes three-dimensional due to this type of suction velocity. Expressions for the flow and temperature fields are obtained by series expansion method. It is found during the course of discussion ...

We study the effect on bubble motion of the sudden streamwise expansion of a liquid-filled tube of square cross-section, which is formed by a pair of backward-facing and forward-facing steps. When a bubble of finite volume traveling under constant volume flux reaches the backward-facing step that marks the start of the expansion, the extent to which it broadens to partially fill the expansion d...