scholarly journals Sinc approximation of the heat distribution on the boundary of a two-dimensional finite slab

2008 ◽  
Vol 9 (3) ◽  
pp. 1103-1111 ◽  
Author(s):  
P.N. Dinh Alain ◽  
P.H. Quan ◽  
D.D. Trong
Keyword(s):  
Heat Distribution ◽  
Two Dimensional ◽  
Sinc Approximation ◽  
Finite Slab

scholarly journals Thermal analysis of Double Stator Switched Reluctance Machine (DSSRM) with and without a squirrel cage rotor

2017 ◽  
Vol 66 (1) ◽  
pp. 189-198 ◽  
Author(s):  
Mohammadali Abbasian ◽  
Hadi Jalali
Keyword(s):  
Thermal Analysis ◽  
Heat Distribution ◽  
Two Dimensional ◽  
Limited Information ◽  
Switched Reluctance Machine ◽  
Switched Reluctance ◽  
Reluctance Machine ◽  
Squirrel Cage ◽  
Computational Fluid Dynamics Cfd ◽  
Cage Rotor

Abstract Double Stator Switched Reluctance Machine (DSSRM) is a novel switched reluctance machine with limited information about its heat distribution and dissipation. This paper presents a two dimensional (2-D) thermal analysis of Double Stator Switched Reluctance Machine (DSSRM) to observe actual heat distribution in the parts of the machine, using Finite Element Method (FEM). Two topologies for the rotor of DSSRM are considered, Non-Squirrel Cage Double Stator Switched Reluctance Machine (NSC-DSSRM) and Squirrel Cage Double Stator Switched Reluctance Machine (SC-DSSRM). The heat distribution of these two topologies is analyzed, using Computational Fluid Dynamics (CFD). Finally the results are presented and compared.

Surface Temperatures in Distributed Contacts. Application to Bearing Design

1977 ◽  
Vol 99 (2) ◽  
pp. 277-283 ◽  
Author(s):  
A. Floquet ◽  
D. Play ◽  
M. Godet
Keyword(s):  
Fourier Transform ◽  
Heat Distribution ◽  
Two Dimensional ◽  
Transform Methods ◽  
Cooling Conditions ◽  
Design Changes ◽  
Fourier Transform Methods ◽  
Plastic Liner ◽  
Bearing Design ◽  
Contact Arc

Two dimensional Fourier transform methods developed by Ling to calculate contact temperatures were applied to the case of a dry bearing operating with a plastic liner. Results show that uncertainties concerning heat distribution along the contact arc cause smaller differences in contact temperatures than some apparently minor design changes. The effect on temperature of various parameters such as liner position, liner thickness, types of motion and speed, and cooling conditions is given. The method proves to be valuable as a guide in the design of dry bearings.

scholarly journals Optimal Heat Distribution Using Asymptotic Analysis Techniques

2021 ◽  
Author(s):  
Zakaria Belhachmi ◽  
Amel Ben Abda ◽  
Belhassen Meftahi ◽  
Houcine Meftahi
Keyword(s):  
Asymptotic Expansion ◽  
Heat Source ◽  
Asymptotic Analysis ◽  
Numerical Experiments ◽  
Thermal Environment ◽  
Topological Derivative ◽  
Maximum Temperature ◽  
Heat Distribution ◽  
Two Dimensional ◽  
Optimal Heat

In this chapter, we consider the optimization problem of a heat distribution on a bounded domain Ω containing a heat source at an unknown location ω⊂Ω. More precisely, we are interested in the best location of ω allowing a suitable thermal environment. For this propose, we consider the minimization of the maximum temperature and its L2 mean oscillations. We extend the notion of topological derivative to the case of local coated perturbation and we perform the asymptotic expansion of the considered shape functionals. In order to reconstruct the location of ω, we propose a one-shot algorithm based on the topological derivative. Finally, we present some numerical experiments in two dimensional case, showing the efficiency of the proposed method.

Approximate solutions of transient and two-dimensional flame phenomena: constant-enthalpy flames

1958 ◽  
Vol 245 (1242) ◽  
pp. 352-372 ◽  
Keyword(s):  
Boundary Layer ◽  
Steady State ◽  
Exact Solutions ◽  
Approximate Solutions ◽  
Large Mass ◽  
Boundary Layer Theory ◽  
Two Dimensional ◽  
Hot Gas ◽  
Finite Slab ◽  
Better Than

The ‘profile’ methods of boundary-layer theory are adapted to predict the behaviour of the transient flames resulting from contact of semi-infinite burnt and unburnt gas masses, contact of unburnt gas with an adiabatic catalyst, immersion of a finite slab of unburnt gas in a large mass of hot gas, and immersion of a finite slab of burnt gas in a large mass of unburnt. Comparison with some exact solutions suggests that the accuracy is normally better than 20%. The method is simple to use. The results are also relevant to two-dimensional steady-state flames.

Spectrophotometric measurements of objective-prism spectra

1966 ◽  
Vol 24 ◽  
pp. 118-119
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Progress Report ◽  
Two Dimensional ◽  
Objective Prism ◽  
Made In

I should like to give you a very condensed progress report on some spectrophotometric measurements of objective-prism spectra made in collaboration with H. Leicher at Bonn. The procedure used is almost completely automatic. The measurements are made with the help of a semi-automatic fully digitized registering microphotometer constructed by Hög-Hamburg. The reductions are carried out with the aid of a number of interconnected programmes written for the computer IBM 7090, beginning with the output of the photometer in the form of punched cards and ending with the printing-out of the final two-dimensional classifications.

Introductory paper

1966 ◽  
Vol 24 ◽  
pp. 3-5
Author(s):  
W. W. Morgan
Keyword(s):  
Line Intensity ◽  
Classification Scheme ◽  
Two Dimensional ◽  
Spectral Classification ◽  
Dimensional Array ◽  
Rr Lyrae ◽  
Metallic Line ◽  
Introductory Paper ◽  
Parameter Varying ◽  
Definition Of

1. The definition of “normal” stars in spectral classification changes with time; at the time of the publication of theYerkes Spectral Atlasthe term “normal” was applied to stars whose spectra could be fitted smoothly into a two-dimensional array. Thus, at that time, weak-lined spectra (RR Lyrae and HD 140283) would have been considered peculiar. At the present time we would tend to classify such spectra as “normal”—in a more complicated classification scheme which would have a parameter varying with metallic-line intensity within a specific spectral subdivision.

A one-dimensional self-gravitating stellar gas

1966 ◽  
Vol 25 ◽  
pp. 46-48 ◽  
Author(s):  
M. Lecar
Keyword(s):  
Gravitational Field ◽  
Phase Space ◽  
Motion Picture ◽  
Space Distribution ◽  
Two Dimensional ◽  
One Dimensional ◽  
Phase Space Distribution ◽  
Dimensional Phase Space ◽  
The Mean

“Dynamical mixing”, i.e. relaxation of a stellar phase space distribution through interaction with the mean gravitational field, is numerically investigated for a one-dimensional self-gravitating stellar gas. Qualitative results are presented in the form of a motion picture of the flow of phase points (representing homogeneous slabs of stars) in two-dimensional phase space.

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