Cryogenic Heat Transfer inside the Tissues with Thermally Significant Blood Vessels during Cryosurgery
To characterize the effect of thermally significant blood vessels (TSBV) on heat transfer inside the tissues during cryosurgery, the bioheat transfer equations controlling both the normal and the tumor tissues together with the Navier-Stokes equations controlling the blood flow inside the blood vessel were numerically solved. The tissues were treated as non-ideal materials with temperature dependent thermophysical properties regarding the effects of blood perfusion and metabolic heat generation in the unfrozen region. The blood was regarded as a Newton fluid with thermal dependent viscosity. It was found that the thermally significant blood vessel had much influence on the temperature distributions inside the normal and the tumor tissues, and the critical isotherm was reshaped to be widely different from that of the case without this blood vessel. Therefore, the optimization of the cryosurgery protocol when such TSBV presents becomes very important in order to avoid cure failure.
heat transfer cryosurgery blood vessel Navier-Stokes equations phase change
Gang Zhao Qian-feng Yu Zhi-feng Liu
Department of Modern Mechanics University of Science and Technology of China, Hefei 230027, China
国际会议
上海
英文
1690-1693
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）