Analysis of pressure and heat distribution in a dilating or contracting filter chamber with two outlets using multivariate spectral quasilinearization method

Heat Transfer ◽  
2021 ◽  
Author(s):  
Modisawatsona L. Lekoko ◽  
Shina D. Oloniiju ◽  
Gabriel Magalakwe
Keyword(s):  
Heat Distribution ◽  
Quasilinearization Method

A Simple Model of Heat Distribution at Various Rayleigh Number in Silicon Elastomer

2021 ◽  
Vol 395 (1) ◽  
pp. 2000230
Author(s):  
Sneha Sama ◽  
Ignazio Blanco ◽  
G. Crescente ◽  
Michelina. Catauro
Keyword(s):  
Simple Model ◽  
Rayleigh Number ◽  
Heat Distribution

Quasilinearization Methods for Nonlinear Parabolic Equations with Functional Dependence

2002 ◽  
Vol 9 (3) ◽  
pp. 431-448
Author(s):  
A. Bychowska
Keyword(s):  
Cauchy Problem ◽  
Parabolic Equations ◽  
Unknown Function ◽  
Functional Dependence ◽  
Nonlinear Parabolic Equations ◽  
Quasilinearization Method ◽  
Convergence Theorems ◽  
Nonlinear Parabolic ◽  
Quasilinearization Methods ◽  
Derivatives Of

Abstract We consider a Cauchy problem for nonlinear parabolic equations with functional dependence. We prove convergence theorems for a general quasilinearization method in two cases: (i) the Hale functional acting only on the unknown function, (ii) including partial derivatives of the unknown function.

scholarly journals Heat Transfer Optimization of NEXA Ballard Low-Temperature PEMFC

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2182
Author(s):  
Artem Chesalkin ◽  
Petr Kacor ◽  
Petr Moldrik
Keyword(s):  
Heat Transfer ◽  
Fuel Cell ◽  
Low Temperature ◽  
Stable Condition ◽  
Energy System ◽  
Proton Exchange ◽  
Cfd Modeling ◽  
Heat Distribution ◽  
Operation Conditions ◽  
Heat Transfer Optimization

Hydrogen is one of the modern energy carriers, but its storage and practical use of the newest hydrogen technologies in real operation conditions still is a task of future investigations. This work describes the experimental hydrogen hybrid energy system (HHS). HHS is part of a laboratory off-grid system that stores electricity gained from photovoltaic panels (PVs). This system includes hydrogen production and storage units and NEXA Ballard low-temperature proton-exchange membrane fuel cell (PEMFC). Fuel cell (FC) loses a significant part of heat during converting chemical energy into electricity. The main purpose of the study was to explore the heat distribution phenomena across the FC NEXA Ballard stack during load with the next heat transfer optimization. The operation of the FC with insufficient cooling can lead to its overheating or even cell destruction. The cause of this undesirable state is studied with the help of infrared thermography and computational fluid dynamics (CFD) modeling with heat transfer simulation across the stack. The distribution of heat in the stack under various loads was studied, and local points of overheating were determined. Based on the obtained data of the cooling air streamlines and velocity profiles, few ways of the heat distribution optimization along the stack were proposed. This optimization was achieved by changing the original shape of the FC cooling duct. The stable condition of the FC stack at constant load was determined.

Simulation of Heat Stress and Fatigue on Engine Case

2013 ◽  
Vol 397-400 ◽  
pp. 413-417
Author(s):  
Chang Hui Hou ◽  
Hong Li Fan ◽  
Qian Sang ◽  
Ji Ping Lu
Keyword(s):  
Heat Stress ◽  
Fatigue Life ◽  
Working Conditions ◽  
Research Result ◽  
High Stress ◽  
Heat Distribution ◽  
Transient Stress ◽  
Working Stress ◽  
Maximal Stress ◽  
Safe Working

In this paper, a model of an engine case is designed in Pro/Engineer for fatigue simulation. The meshing is created by the way of Abaqus. According to the working conditions, the boundary restriction of the simulation is defined. By the simulation, the heat distribution of the engine case is given, the causes of relatively high temperature areas are discussed, and the heat-stress distribution is drawn too. The high stress area in the engine case is discovered. The simulation result shows that the steady working stress is about 60MPa, the transient stress is between 90MPa to 120MPa, and the maximal stress is 136MPa. Based on the heat stress the fatigue life of the engine case is analyzed. The research result is a reference of the engine case safe working.

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