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Skin Burn Injury Prediction Based on Heat Transfer Simulation
Mohammad Fakhrulrezza(모하마드 파크룰레자),Jungkyung Kim(김중경),Hyunjin Lee(이현진) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6
A radiant heater is a promising heating device in electric vehicles to reduce energy consumption and thereby to increase a driving range. The radiant heater locally and directly warms up human body without unnecessarily heating the entire cabin space while offering comparable thermal comfort to drivers and passengers. A concern with the radiant heater is skin burn injury due to an accidental touch with the hot surface of heaters. Skin burn injury is an irreversible thermal alteration in tissues result from denaturation of native state tissue enzymes, proteins, and related structures. Arrhenius models of irreversible thermal alterations in tissues are often used for predicting skin burn based on temperature rise and duration in tissues. In this study, heat transfer simulations were conducted to determine the transient temperature change in a multi-layer skin of fingertip that is in contact with a radiant heater, as shown in Fig. 1. The simulated temperature profiles were imported into an Arrhenius model, and the extent of the burn injury was assessed. With the developed simulation tool, the effects of varying parameters such as the cabin environment temperature the heater surface temperature, and the contact area between heater and fingertip, were investigated.
전기방사기법으로 제작된 인공지지체 내부의 확산현상 측정 및 시뮬레이션
이승열(SeungYoul Lee),이종완(Jongwan Lee),채상민(SangMin Chae),김성준(Seongjun Kim),정영훈(Young Hun Jeong),김중경(JungKyung Kim),진송완(Songwan Jin) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
In this study, we made line patterns of nanofiberous structures using electrospinning technique and alginate hydrogel and we measured local diffusion coefficient of 3 kDa FITC-dextran using the fluorescence recovery after photobleaching(FRAP) technique. As results of the FRAP measurements, we didn’t observe any significant differences in the diffusivity among the samples. Calculated diffusivity of the electrospun line patterns and alginate hydrogel based on the measured oxygen diffusivity appeared to be about 92?94% as compared with the oxygen diffusivity in water. We also conducted the simulation of oxygen diffusion phenomena within the 3D model scaffold which is consisted that oxygen permeable line structures scaffold and solid scaffold with various oxygen diffusivity.