In this note we consider the application of the WENO scheme to simulations of steady-state flow in a converging diverging nozzle. We demonstrate the recovery of design accuracy through Gegenbauer postprocessing, despite the degradation of the order of accuracy for the numerical solution of the Euler equations to first-order in regions where the characteristics passed through the shock. We have ...

In this paper, flow and heat transfer of nanofluid through a converging or diverging channel with porous medium is investigated. The fluid constantly flows under the effect of magnetic field through the channel. The diverging/converging fluid motion is modeled using the momentum and energy equations. The influence of some parameters such as opening channel angle, Reynolds number and Darcy’s num...

Flashing flows of initially sub-cooled water in a converging–diverging nozzle is investigated numerically the framework two-fluid model (TFM). The thermal non-equilibrium effect phase change considered by an interfacial heat transfer model, while pressure jump across interface ignored. bubble size distribution induced nucleation, growth/shrinkage, coalescence, and breakup described based on are...

The flow channel design in a proton exchange membrane fuel cell is critical for transporting reactant gases and removing product water efficiently. Herein, we proposed performed comprehensive study of four designs: straight, wavy, 2D-Nozzle, the novel 3D-Nozzle. Using limiting current method, discovered that oxygen transport resistance 2D-Nozzle designs are similar confirming diffusive mechanis...

The effects of unsteady bubble dynamics on cavitating flow through a converging-diverging nozzle are investigated numerically. A continuum model that couples the Rayleigh–Plesset equation with the continuity and momentum equations is used to formulate unsteady, quasi-one-dimensional partial differential equations. Flow regimes studied include those where steady-state solutions exist, and those ...

A theoretical study analyzing three-dimensional combustion acoustic instabilities in a liquid propellant rocket engine combustor has been conducted. A linear theory based on Crocco’s pressure sensitive time lag model is used. To apply this theory the combustor is divided into two main components, including the combustion chamber and the converging part of the nozzle. The assumption of concentra...