Construction and analysis of finite element model for heat transfer in infant sleeping bag
Choosing suitable infant sleeping bags under different environmental conditions plays an important role in maintaining thermal comfort of infants.A three-dimensional(3D)numerical model of"infant body-sleeping bag-environment"is established by the finite element software COMSOL,including four parts:infant body heat source,sleeping bag,underclothing microclimate layer,and the ambient-air domain,to investigate the warmth of sleeping bags at different ambient temperatures and the relationship between local skin temperature and the warmth of sleeping bags in infants and young children.The temperature distribution of the sleeping bag is simulated in different ambient environment conditions,and thermal insulation and microclimate layer temperature are calculated.Additionally,the model is validated by thermal testing of actual samples.The results show that the relative errors between the simulated and experimental values of the microclimate temperature and thermal insulation are relatively small with good agreement,which indicate that the established finite element model has a good simulation effect of heat transfer;the microclimate temperature is positively correlated with ambient temperature linearly,and the ambient temperature interval for maintaining thermal comfort of infant sleeping bags is obtained;there is a big difference in microclimate temperature between different body parts of infants and young children and sleeping bags,so in the sleeping bag product design,the trunk and leg parts can be adopted with regional thermal insulation design.
万方数据
维普
