Comparison of physical and mathematical models of whole gas cryotherapy with lumped and distributed parameters
The results of the numerical solution of the heat problem of whole body gas cryotherapy (WBGC) using models with lumped and distributed parameters have been presented. Heat transfer coefficients from the surface of various parts of the human body, which correspond to given (measured by thermographic technique) average temperatures of these surfaces after the completion of WBGC procedure were calculated. It has been found out that the model with lumped parameters gives strongly understated values of heat transfer coefficients in comparison with empirical reference data. Model with distributed parameters reveals the best fit of the calculated heat transfer coefficients to the reference data. The maximum difference was less than 26%.