Study of Surface and Volumetric Heating Effects in a Mach 5 Flow

Abstract It is proposed that tire-pavement friction is controlled by thermal rather than by hysteresis and viscoelastic effects. A numerical model of heating effects in sliding is described in which the friction coefficient emerges as a dependent variable. The overall results of the model can be expressed in a closed form using Blok's flash temperature theory. This allows the factors controlling rubber friction to be recognized directly. The model can be applied in quantitative form to metal-polymer-ice contacts. Several examples of correlation are given. The difficulties of characterizing the contact conditions in tire-pavement friction reduce the model to qualitative form. Each of the governing parameters is examined in detail. The attainment of higher friction by small, discrete particles of aluminum filler is discussed.

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Deck heating effects due to VTOL jet exhaust impingement

10.2514/6.1973-1182 ◽

1973 ◽

Author(s):

O. CASTELLS ◽

R. MISHLER

Keyword(s):

Heating Effects

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Laser Failure Isolation Techniques Demonstrated On Test Structures

ISTFA 2008: Conference Proceedings from the 34th International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2008p0354 ◽

2008 ◽

Author(s):

Frank S. Arnold

Keyword(s):

Integrated Circuits ◽

Laser Beam ◽

Case Studies ◽

Induced Resistance ◽

Simple Test ◽

Resistance Change ◽

Cross Sectional ◽

Beam Focusing ◽

Isolation Techniques ◽

Heating Effects

Abstract To be better prepared to use laser based failure isolation techniques on field failures of complex integrated circuits, simple test structures without any failures can be used to study Optical Beam Induced Resistance Change (OBIRCH) results. In this article, four case studies are presented on the following test structures: metal strap, contact string, VIA string, and comb test structure. Several experiments were done to investigate why an OBIRCH image was seen in certain areas of a VIA string and not in others. One experiment showed the OBRICH variation was not related to the cooling and heating effects of the topology, or laser beam focusing. A 4 point probe resistance measurement and cross-sectional views correlated with the OBIRCH results and proved OBIRCH was able to detect a variation in VIA fabrication.

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Simulation of volumetric heating of a moist medium with allowance for fluid mobility

Proceedings of the Mavlyutov Institute of Mechanics ◽

10.21662/uim2012.1.017 ◽

2012 ◽

Vol 9 (1) ◽

pp. 91-93

Author(s):

U.R. Ilyasov ◽

A.V. Dolgushev

Keyword(s):

Mass Transfer ◽

Porous Medium ◽

Numerical Solution ◽

Heat And Mass Transfer ◽

Transfer Process ◽

Thermal Action ◽

Mass Transfer Process ◽

Low Permeability ◽

Volumetric Heating ◽

Drying Regime

The problem of volumetric thermal action on a moist porous medium is considered. Numerical solution, the influence of fluid mobility on the dynamics of the heat and mass transfer process is analyzed. It is established that fluid mobility leads to a softer drying regime. It is shown that in low-permeability media, the fluid can be assumed to be stationary.

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