The natural convection in differentially heated rectangular cavities with a fin attached to the cold wall was investigated numerically. The top and the bottom horizontal walls of the cavities were insulated while their left and the right vertical walls were maintained at a constant temperature Th and Tc, respectively with Th > Tc. The governing equations written in terms of the primitive variab...

A hybrid numerical model previously developed for combustion simulations is extended in this article to describe flame propagation and stabilization porous media. The model, with a special focus on flame/wall interaction processes, validated via corresponding benchmarks involving channels both adiabatic constant-temperature walls. Simulations different channel widths show that the can correctly...

Taking the axial heat conduction of wax deposition layer into account, a two-dimensional heat transfer model of calculating the temperature profile inside wax deposition layer was deduced and established based on the energy balance equation, the finite difference method was used to solve this model, and the influence of axial heat conduction on the distribution law of temperature profile inside...

This paper presents the application of finite element method (FEM) to analyze the tube temperature distribution in a water tube boiler. Two-dimensional (2-D) finite element models are developed where the axi-symmetric triangular elements for the cross section area along the water tube are applied in computer software namely MSC Patran-Nastran. The analysis of the temperature distribution for ev...

In this study, we numerically investigate the evolution of two-dimensional mixing and heat transfer enhancement within a two-rod stirring device. The fluid is heated by the walls, which are maintained at a constant temperature. We show by analysis of different stirring protocols that the use of discontinuous wall rotations is necessary to promote heat transfer by chaotic mixing. This condition ...

the effect of partial slip and temperature dependent fluid properties on the mhd mixed convection flow from a heated, non-linearly stretching surface in the presence of radiation and non-uniform internal heat generation/absorption is investigated. the velocity of the stretching surface was assumed to vary according to power-law form. thermal transport is analyzed for two types of non-isothermal...

This study aimed to examine the risks from window frames installed in opening of an outer wall when exposed high temperatures and secure DB through tests on thermal tensile strength characteristics different materials. Al6063-T5 was tested up 600 ℃ at intervals 100 ℃. Changes properties decreases occurred rapidly 400 The measured as 84.41 MPa, i.e., 34.1% that room temperature (the maximum test...

Many studies have focused on the mechanisms underlying length and width determination in rod-shaped bacteria. Here, we focus instead on cell surface area to volume ratio (SA/V) and demonstrate that SA/V homeostasis underlies size determination. We propose a model whereby the instantaneous rates of surface and volume synthesis both scale with volume. This model predicts that these relative rates...

A series of V-MCM-41 samples was prepared with very long-range ordered structure, different pore sizes, and constant composition by applying a recently developed quantitative model [Y.H. Yang, S.Y. Lim, C. Wang, D. Harding, G.L. Haller, Micropor. Mesopor. Mater. 67 (2–3) (2004) 245–257]. Oxygen titration of catalysts pre-reduced with methanol vapor at the reaction temperature showed a constant ...