Mathematical modelling of the effect of fire exposure on a new type of protective clothing

Mercer, G. N.; Sidhu, Harvinder

doi:10.21914/anziamj.v49i0.346

Cited by 26 publications

(20 citation statements)

References 16 publications

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“…Xu et al [2009] have formulated the mathematical model of skin bio-heat transfer with selected case studies. Mercer and Sidhu [2007] established the mathematical model to understand the heat transport behavior through a new type of protective clothing that varies its properties with temperature. Khanday and Saxena [2010] and Khanday et al [2014] have estimated the fluid distribution in human dermal regions with the help of variational finite element method.…”

Section: Methodsmentioning

confidence: 99%

Tissue necrosis and passage of fluid due to cold stress from the thermally damaged human body peripherals: A mathematical model

Khanday

Hussain

Nazir

2015

Int. J. Comp. Mat. Sci. Eng.

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The development of cold injury takes place in the human subjects by means of crystallization of tissues in the exposed regions at severe cold temperatures. The process together with the evaluation of the passage of fluid discharge from the necrotic regions with respect to various degrees of frostbites has been carried out by using variational finite element technique. The model is based on the Pennes' bio-heat equation and mass diffusion equations together with suitable initial and boundary conditions. The results are analyzed in relation with atmospheric temperatures and other parameters of the tissue medium.

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Section: Methodsmentioning

confidence: 99%

Tissue necrosis and passage of fluid due to cold stress from the thermally damaged human body peripherals: A mathematical model

Khanday

Hussain

Nazir

2015

Int. J. Comp. Mat. Sci. Eng.

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“…In keeping with other skin heat transfer models [6,7,10] the skin is assumed to consist of three layers (the epidermis, dermis and subcutaneous layers), see Figure 1. The thermal-physical properties are assumed constant within a skin layer but varying between layers and typical values used are also shown.…”

Section: Mathematical Modelmentioning

confidence: 99%

Modelling the cryogenic treatment of warts and recommendations for changes to current clinical practice

Mercer¹,

Tyson²

2009

ANZIAMJ

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Cryotherapy is a commonly used and recommended treatment for warts and there is wide variation in technique between clinicians applying the same mode of cryotherapy. To address this uncertainty in clinical practice a mathematical model is used to demonstrate the relationship between freezing time and tissue freezing zone for two commonly used cryogens (liquid nitrogen spray and nitrous oxide probes). It is found that nitrous oxide probes need substantially longer application time to obtain the same necrosis region as liquid nitrogen sprays. Overspray from liquid nitrogen spray is shown to lead to increased damage to healthy tissue surrounding a wart. Using a barrier of petrolatum (petroleum jelly) on the healthy tissue is demonstrated to be an effective means for limiting this damage. Changes to clinical practice to take account of these findings are recommended and need clinical trials to verify their applicability.

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“…According to the monolayer model, many researchers also study the multilayer moisture and heat transfer model of thermal protective clothing, Mell and Lawson (2000) firstly established a heat transfer model between layers of multilayer fabric, which is develop from Torvi's model. Because phase change materials have an influence on thermal protection performance of clothing, a multilayer dynamic heat transfer model with phase change materials was built (Mercer & Sidhu, 2008;Elgafy & Mishra, 2014). Considering the effect of moisture on thermal protection, Lawson et al (2010) made continued developments in protective clothing modeling of multilayer composite state under instantaneous conditions.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Model of Multilayer Thermal Protective Clothing for High-Temperature Operation

Li¹,

Zhu²,

Han³

et al. 2019

MAS

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The thermal protective clothing for high-temperature operation usually consists of three-layer fabrics and a gap called the air layer or Layer IV between Layer III and skin. In order to design more effective thermal protective clothing at less cost, based on the heat transfer principles, we establish heat transfer models of fabrics and air layer, which are one-dimensional nonlinear partial differential equations with constant coefficients. In the three-layer fabrics, we consider the effects of heat conduction and heat radiation in Layer I but only consider heat conduction in Layer II and Layer III. Furthermore, the heat transfer model of Layer IV is decoupled and simplified to steady-state heat conduction in Layer IV and radiation heat transfer on surface of Layer IV. According to the explicit difference schemes for the models, we use the parameters in an experiment which puts a thermal manikin in high-temperature environment for some time and measures the temperature of lateral skin at regular time, to solve the models and calculate the temperature of each layer. With MATLAB, the visual interface of three-dimensional temperature distribution is provided, which is reference for functional design of thermal protective clothing. We also compare the simulation result of skin surface with the experimental data. The results show that at the same position, the temperature rises over time but with decreasing rate and finally reaches the steady state. Moreover, at one moment after reaching the steady state, the temperature has a gradual decrease with the increase of distance from the external environment.

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Mathematical modelling of the effect of fire exposure on a new type of protective clothing

Cited by 26 publications

References 16 publications

Tissue necrosis and passage of fluid due to cold stress from the thermally damaged human body peripherals: A mathematical model

Tissue necrosis and passage of fluid due to cold stress from the thermally damaged human body peripherals: A mathematical model

Modelling the cryogenic treatment of warts and recommendations for changes to current clinical practice

Heat Transfer Model of Multilayer Thermal Protective Clothing for High-Temperature Operation

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