THERMAL TRANSPORT PHENOMENON IN PROCESSED MEAT HEATED BY LASER HEAT SOURCE

The present study deals with the effect of laser radiation on the propagation phenomenon of a thermal wave in processed meat subjected to symmetrical heating on both sides. Laser heating is modeled as an internal heat source with various time characteristics. The Cattaneo heat flux law, together with the energy conservation equation, is solved by a numerical technique based on an explicit scheme, i.e. MacCormack's predictor-corrector scheme. The study concludes that (1) if the absorption coefficient of the continuously operated laser heat source increases, then temperature overshoot occurs in processed meat within a very short period of time; (2) the overshoot and oscillation of thermal wave depend on the frequency of the heat source time characteristics; and (3) the criterion for the occurrence of thermal wave in a thin processed meat is the thickness of the order of about 1 mm.

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THERMAL-WAVE PROPAGATION PHENOMENON IN THIN FILMS HEATED WITH LASER HEAT SOURCE

Journal of Mechanics in Medicine and Biology ◽

10.1142/s0219519404001235 ◽

2004 ◽

Vol 04 (04) ◽

pp. 435-445 ◽

Cited By ~ 1

Author(s):

SHUICHI TORII ◽

WEN-JEI YANG

Keyword(s):

Thin Film ◽

Heat Source ◽

Thermal Wave ◽

Numerical Study ◽

Numerical Technique ◽

Internal Heat ◽

Time History ◽

Internal Heat Source ◽

Hyperbolic Heat Conduction ◽

Short Period

A numerical study is performed on the effect of laser radiation on the propagation phenomenon of a thermal wave in a very thin film subjected to a symmetrical heating on both sides. Laser heating is modelled as an internal heat source. The non-Fourier, hyperbolic heat conduction equation is solved by a numerical technique based on MacCormack's predictor-corrector scheme. Consideration is given to the time history of heat transfer behaviour before and after symmetrical collision of wave fronts from two sides of a film. It is disclosed that (i) if the absorption coefficient of the laser increases, temperature overshoot causes in a very thin film within a very short period of time, and (ii) the overshoot and oscillation of thermal wave depend on the frequency of the heat source time characteristics. This trend becomes minor in a thick film.

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Theoretical Exploration of Exponential Heat Source and Thermal Stratification Effects on The Motion of 3-Dimensional Flow of Casson Fluid Over a Low Heat Energy Surface at Initial Unsteady Stage

Journal of Theoretical and Applied Mechanics ◽

10.1515/jtam-2017-0010 ◽

2017 ◽

Vol 47 (2) ◽

pp. 61-82 ◽

Cited By ~ 6

Author(s):

N. Sandeep ◽

I.L. Animasaun

Keyword(s):

Heat Source ◽

Velocity Ratio ◽

Uniform Space ◽

Internal Heat ◽

Internal Heat Source ◽

Intermolecular Forces ◽

Casson Fluid ◽

Heat Energy ◽

3 Dimensional ◽

Short Period

AbstractWithin the last few decades, experts and scientists dealing with the flow of non-Newtonian fluids (most especially Casson fluid) have confirmed the existence of such flow on a stretchable surface with low heat energy (i.e. absolute zero of temperature). This article presents the motion of a three-dimensional of such fluid. Influence of uniform space dependent internal heat source on the intermolecular forces holding the molecules of Casson fluid is investigated. It is assumed that the stagnation flow was induced by an external force (pressure gradient) together with impulsive. Based on these assumptions, variable thermophysical properties are most suitable; hence modified kinematic viscosity model is presented. The system of governing equations of 3-dimensional unsteady Casson fluid was non-dimensionalized using suitable similarity transformation which unravels the behavior of the flow at full fledge short period. The numerical solution of the corresponding boundary value problem (ODE) was obtained using Runge-Kutta fourth order along with shooting technique. The intermolecular forces holding the molecules of Casson fluid flow in both horizontal directions when magnitude of velocity ratio parameters are greater than unity breaks continuously with an increase in Casson parameter and this leads to an increase in velocity profiles in both directions.

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