This study investigates numerically the 2D laminar natural convection in a Saltbox roof type geometry under summer climate conditions as obtained Africa, particularly Nigeria using ANSYS FLUENT to model boundary conditions. The effects of Rayleigh number (Ra) within range 103-107 and pitch angles (top base) on heat transfer, flow structure, temperature distribution entropy generation were analy...

The present paper aims to study the effect of partial blocking and flow regime on mutual turbulent interplay between porous non-porous regions in packed bed energy storage systems (PBESSs). To this end, high-fidelity pore-scale large eddy simulations (LES) are conducted for two PBESS configurations, namely full blockage under discharge process at three Re numbers 3600, 7200, 14,400. influences ...

Abstract This study investigates the enhancement of heat transfer for fluid with addition nano-particles in a two-dimensional rectangular cavity. Thermo-physical properties such fluids and volume fraction those its characteristics are studied. ANSYS Fluent code is utilized this purpose. Validation computational model has been carried out against benchmark data available from literature. A corre...

A stagnation-point flow model based in part on the mass transfer B-number was adapted to approximate heat flux and time ignition of dowel arrays subject forced convection flame spread. Previous work spread along a array has characterized existence discretized behavior. In deployment-scale wildland fire models, small fuels are smaller than grid resolution. Sub-grid modeling then relies empirical...

In this research work natural convection in two dimensional cavity is studied numerically for differently heated air filled square and rectangular cavity. Vertical with adiabatic hot cold wall different aspect ratio of 1, 2.5, 5, 7.5 10 has taken investigation. the heat transfer was investigated over wide range Rayleigh number from 103 to 106 . Solutions are obtained several numbers Prandtl Pr ...

Heat transfer and entropy generation are analysed theoretically in a thermal model of microreactors accommodating processes with large heat of reaction. This includes an asymmetric, thick wall, partially-filled porous microchannel under local thermal non-equilibrium. The system features exothermicity/endothermicity within the solid and fluid phases to represent heat of chemical reactions and ab...

For a finite group $G$ let $nu(G)$ denote the number of conjugacy classes of non-normal subgroups of $G$. We give a short proof of a theorem of Brandl, which classifies finite groups with $nu(G)=1$.

‎Let $G$ be a finite group and $nu(G)$ denote the number of conjugacy classes of non-normal subgroups of $G$‎. ‎In this paper‎, ‎all nilpotent groups $G$ with $nu(G)=3$ are classified‎.  

Cost-effective, lightweight design alternatives for the thermal management of heat transfer equipment are required. In this study, porous plate and perforated-porous plates used nanoliquid convection control in a flexible-walled vented cavity system under uniform magnetic field effects. The finite element technique is employed with arbitrary Lagrangian–Eulerian (ALE) method. numerical study per...

in this work, the steady and laminar mixed convection of nanofluid in horizontal concentric annulus withrotating inner cylinder is investigated numerically. the inner and outer cylinders are kept at constanttemperature ti and to respectively, where ti>to. the annular space is filled with alumina-water nanofluid.the governing equations with the corresponded boundary conditions in the polar coord...