Transient Temperature Distribution in Human Dermal Part With Protective Layer at Low Atmospheric Temperature

Gurung, Dil Bahadur; Saxena, V. P.

doi:10.1142/s1793524510001070

Cited by 21 publications

(16 citation statements)

References 6 publications

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“…The results are comparable with those obtained in [10,11] who considered onl corporated more feasible layers and has taken significant biophysical parameters in case of human males and females. After considering differences in metabolic heat production between sexes, males and females would differ in their physiological responses in temperature distribution.…”

Section: Discussionsupporting

confidence: 88%

Effect of Metabolic Reactions on Thermoregulation in Human Males and Females Body

Acharya¹,

Gurung²,

Saxena³

2013

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The paper describes the study of metabolic effect relying on dermal thicknesses of males and females for temperature distribution of the layers of dermal part at various atmospheric temperatures. The study has been carried out for one dimensional steady and unsteady cases using finite element method. Lower percentage of muscle mass and higher percentage of adipose tissue in subcutaneous part of females result lower metabolic rate compared to males. Metabolism is considered as a heat source within the body tissue. The appropriate physical and physiological parameters together with suitable boundary conditions that affect the heat regulations have been incorporated in the model.

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Section: Discussionsupporting

confidence: 88%

Effect of Metabolic Reactions on Thermoregulation in Human Males and Females Body

Acharya¹,

Gurung²,

Saxena³

2013

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“…Agrawal et al [21] constructed two dimensional thermal distributions model in dermal layers of elliptical shaped human limbs involving metastasis of tumors. Gurung and Saxena [6] used Eq. (2.1) to construct a model for one dimensional transient temperature distribution in human dermal part with protective layer at low atmospheric temperature.…”

Section: Bio-heat Transfer Equationmentioning

confidence: 99%

“…A hand skin surface temperature of 20 0 C is considered to be uncomfortably cold, 15 0 C to be extremely cold, and 5 0 C to be painfully cold [4]. Many models have been developed for SST temperature distribution profile at normal and abnormal ambient temperatures for still air [5][6][7][8][9]. Earlier experimental investigations were made by Patterson [10] to obtain temperature profiles in the SST Region.…”

Section: Introductionmentioning

confidence: 99%

Two dimensional temperature distribution model in human dermal region exposed at low ambient temperatures with air flow

Gurung

2013

Kathmandu University J of Sci, Engineering & Technol

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This paper deals with thermo-regulation in human dermal part in a cold atmosphere with significant air flow. The mathematical model involving bio-heat equation has been solved using finite element method and Crank-Nicolson technique to numerically investigate two dimensional temperature distributions. The natural three layers of dermal partepidermis, dermis, and subcutaneous tissue are considered for the study. The important parameters like blood mass flow rate, metabolic heat generation rate and thermal conductivity are taken distinct in each layer according to their distinct sub-regional activities. The human subject is assumed in static condition. The wind speed is considered in the range from the start of forced convection ( 0.2 m/s) and up to 5 m/s. The loss of heat from the skin surface to the environment is taken due to convection, radiation, and insensible perspiration.

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“…In a human body the internal body temperature almost remains constant despite the fluctuation of environmental temperatures up to certain limits. The main organ that keeps core temperature constant is dermal part [1]. There is no skin layer to keep the core temperature constant in case of human eye.…”

Section: Introductionmentioning

confidence: 99%

“…The difficulty of modeling in the eye is due to the impact of blood flow on the heat transfer; however, incorporating the impact of blood flow in heat transport calculation is very important [2]. The temperature inside the human body depends on the degree of temperature, duration of exposure and the environmental conditions which cause heat gain/loss from tissues [1]. Hence, blood flow and time are the main factors that affect temperature distribution in human eye.…”

Section: Introductionmentioning

confidence: 99%

FEM Approach for Transient Heat Transfer in Human Eye

Gokul¹,

Gurung²,

Adhikary³

2013

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In this paper, a bio-heat transfer model of temperature distribution in human eye is discussed using appropriate boundary conditions for cornea and sclera. Variational finite element method with Crank-Nicolson scheme is used to calculate the transient temperature distribution in normal human eye. The temperature with and without the effect of blood perfusion and metabolism on retina is simulated and compared for various ambient temperatures, evaporation rates and lens thermal conductivities. The obtained results are compared with experimental results and past results found in literatures. The results show that the steady state corneal temperature is achieved in around 31 and 45 minute of exposure at ambient temperatures 10˚C and 50˚C respectively. Steady state eye temperature is achieved earlier at higher evaporation rate. Similar result is achieved for higher lens thermal conductivity and also for lower ambient temperature.

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Transient Temperature Distribution in Human Dermal Part With Protective Layer at Low Atmospheric Temperature

Cited by 21 publications

References 6 publications

Effect of Metabolic Reactions on Thermoregulation in Human Males and Females Body

Effect of Metabolic Reactions on Thermoregulation in Human Males and Females Body

Two dimensional temperature distribution model in human dermal region exposed at low ambient temperatures with air flow

FEM Approach for Transient Heat Transfer in Human Eye

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