The development of phase change models applicable to a wide range temperatures, pressures, and mass flow rates is primarily limited by the metastable or partially stable behaviour fluid. Due this, fluid does not even after crossing saturation conditions. Most liquid–vapour have been developed for cavitation process where sustained, occurs in very narrow region space, under equilibrium In this p...

High-aspect-ratio (HAR) rectangular jets have attracted attention in automobile air conditioning (A/C) systems and turbulent jet applications owing to their excellent delivery mixing attractive interior design. Active flow control (AFC) of using plasma actuators (PAs) has proven be a promising technique because the actuator is simple, low energy consumption, can create features without interfer...

Metamodels are developed and used for aerodynamic optimization of a ducted opening integrated into high-rise building to maximize the amplification factor within duct. The duct consists nozzle, throat, diffuser. 211 high-resolution 3D RANS CFD simulations performed generate training testing datasets. space-filling design Genetic algorithm data sampling optimization, respectively. performance fi...

A mathematical model is developed for viscous slip flow and heat transfer in water/Ethylene glycol-based nanofluids containing metallic oxide nanoparticles, through a converging/diverging channel. We adopt the single-phase Tiwari–Das model. The governing equations are transformed to set of similarity differential with help transformation, before being solved numerically using Maple 20. Validati...

Stable drop jettability is mandatory for a successful, technical scale inkjet printing, and accordingly, this aspect has attracted much attention in fundamental and applied research. Previous studies were mainly focused on Newtonian fluids or polymer solutions. Here, we have investigated the drop jetting for zinc oxide (ZnO) particulate suspensions. Generally, the inverse Ohnesorge number Z = O...

• Numerical framework for wall-bounded flashing flow of cryogenic liquids proposed. Evaluation pressure- and density-based solvers with different thermodynamics closures. Introduction universal methodology suitable sub- supercritical conditions. Elucidation flow-expansion dynamics in regimes. DES capturing instabilities induced by transition from super- to subsonic flow. The two-phase liquid ox...

Laminar fully developed ow and pressure drop in linearly varying cross -section converging-diverging microtubes have been is investigated in this work. These microtubes are formed from a series of converging-diverging modules. An analytical model is developed for frictional ow resistance assuming parabolic axial velocity pro le in diverging and converging sections. Frictional ow resistance is f...

In this work, we optimise microfluidic converging/diverging geometries in order to produce constant strain-rates along the centreline of the flow, for performing studies under homogeneous extension. The design is examined for both two-dimensional and three-dimensional flows where the effects of aspect ratio and dimensionless contraction length are investigated. Initially, pressure driven flows ...

We present measurements of collisional fluorescence quenching cross sections of NO(A(2)Σ(+), v' = 0) by NO(X(2)Π) and O2 between 34 and 109 K using a pulsed converging-diverging nozzle gas expansion, extending the temperature range of previous measurements. The thermally averaged fluorescence quenching cross sections for both species show a monotonic increase as temperature decreases in this te...