To understand the effect of cavitation on tip leakage vortex (TLV), turbulent cavitating flows were numerically investigated using shear-stress transport (SST) k–ω turbulence model and Zwart–Gerber–Belamri model. In this work, two computations performed—one without other with cavitation—by changing inlet pressure pump. The results showed that had little difference between blade surfaces for a c...

The k-ω Shear Stress Transport (SST) turbulence model is adopted to study the hydrodynamic performance of the water-jet axial pump which is applied in Unmanned Surface Vehicle (USV). The numerical simulation of the whole passage of the water-jet pump is carried out for four different tip clearance with δ = 0.3 mm, δ = 0.8 mm, δ = 1 mm and δ = 1.4 mm. And the results, in term of external charact...

Tip leakage loss introduces major part of losses of the rotor in axial gas turbines. Therefore, the rotor blade tip has a considerable effect on rotor efficiency. To understand the flow physics of the rotor tip leakage, we solve the flow field for different tip platforms (passive flow control) and by considering coolant tip injection (active flow control). Various blade tip configurations s...

In this study, the phase-locking of El Nino Southern Oscillation (ENSO) in a coupled model with different physical parameter values is investigated. It is found that there is a dramatic change in ENSO phaselocking in response to a slight change in the Tokioka parameter, which is a minimum entrainment rate threshold in the cumulus parameterization. With a smaller Tokioka parameter, the model sim...

Abstract The objective of this paper is to experimentally and numerically investigate the transient cavitation flow during startup process mixed pump with emphasis on studying influence blade numbers. simulation was studied based improved SST k-ω turbulence model Zwart model. Firstly, in order obtain relationship between rate variation rotational speed at startup, a theoretical analysis fast tr...

Predicting hemolysis is a mandatory task when designing blood flow related mechanisms. For decades, researchers have tried to estimate trauma in red cell (RBC) for applying assist mechanisms development, but the specificity and absence of more physical details limited models this purpose into ranges applications. This work aims present new method modelling considering stress threshold that RBC ...

Locomotion profoundly changes sensory responses in mouse primary visual cortex. These changes are thought to arise from a disinhibitory circuit, whereby interneurons expressing vasoactive intestinal peptide (Vip) inhibit those expressing somatostatin (Sst), thus disinhibiting pyramidal cells (Pyr). We studied the effect of locomotion on these cell types and on interneurons expressing parvalbumi...

Due to a rapid increase in urbanisation, accurate wind microclimate assessment is of crucial importance. Evaluating flows around buildings part the planning application process design new developments. In this study, computational fluid dynamics (CFD) simulations are carried out for case representing East Village London Olympic Park. Following validation test against experimental data simpler u...

A method is developed to quantify systematic errors in two types of sea surface temperature (SST) observations: bucket and engine-intake measurements. A simple linear model is proposed where the SST measured using a bucket is cooled or warmed by a fraction of the air–sea temperature difference and the SST measured using an engine intake has a constant bias. The model is applied to collocated ni...