The present work concerns the activity performed to upgrade an in house finite volume CFD solver for computing heat transfer in gas turbine cooling devices. The “conjugate simulation” of fluid heat transfer and metal heat conduction has been considered. To this aim the original code has been coupled to a new one solving the Fourier equation in the solid domain. This modification allows the “con...

In this paper, conjugate heat transfer of magneto hydrodynamic mixed convection of nanofluid about a vertical slender hollow cylinder embedded in a porous medium with high porosity have been numerically studied. The Forchheimer’s modification of Darcy’s law was used in representing the nanofluid motion inside the porous media. The governing boundary layer equations were transformed to non-dimen...

An exhaustive experimental investigation has been carried out for accurate determination of interstitial heat transfer coefficients of ceramic foams in forced convective flows. The single-blow method was used, in which, the fluid temperature varies with time and convective heat transfer becomes time-dependent. The method results in a transient and conjugate heat transfer phenomena between the f...

The rapid advancement of numerical techniques and the availability of increasingly powerful supercomputers recently enabled scientists to use large eddy simulation (LES) to simulate numerically the flow in a full subassembly composed of wire-wrapped pins. Because of the extreme computational cost of such simulation, it was not possible to conduct a sensitivity case on the pin-wire interface mod...

Boiling conjugate heat transfer is an active field of research encountered in several industries, including metallurgy, power generation and electronics. This paper presents a computational fluid dynamics approach capable accurately modelling the flow phenomena during immersion quenching: process which hot solid immersed into liquid, leading to sudden boiling at solid–liquid interface. The adop...

This article presents a framework that describes formally the underlying unsteady and conjugate heat transfer processes that are undergone in thermodynamic systems, along with results from its application to the characterisation of thermodynamic losses due to irreversible heat transfer during reciprocating compression and expansion processes in a gas spring. Specifically, a heat transfer model ...

In this study, high-fidelity conjugate heat transfer simulations are used to model a micro-channel exchanger (MCHE) in crossflow study its thermal-hydraulic performance. Three different microchannel geometries, namely circular, triangular, and square with louver-shaped fins, considered. The local flow field showed strong coupling between the flow, solid domain, crossflow. separation wake region...

A conjugate heat transfer investigation was conducted to better understand the effects of an impinging radial slot jet cooling device on both the heat transfer rates and temperature fields in the fluid, and especially in the cylindrical solid cooled by this device. Such temperature nonuniformities in the solid are of practical interest as they may result in phenomena such as nonuniform material...