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The phase change thermoelastic analysis of biological tissue with variable thermal properties during cryosurgery |
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| Authors: | Xiaoya Li Pengfei Luo Qing-Hua Qin |
| Affiliation: | 1. State Key Laboratory for Strength and Vibration of Mechanical Structures, Shaanxi Engineering Research Center of Nondestructive Testing and Structural Integrity Evaluation, School of Aerospace, Xi’an Jiaotong University, Xi’an, PR China;2. Research School of Electrical, Energy and Materials Engineering, College of Engineering and Computer Science, Australian National University, Acton, ACT, Australia;3. Research School of Electrical, Energy and Materials Engineering, College of Engineering and Computer Science, Australian National University, Acton, ACT, Australia |
| Abstract: | AbstractIn this work, the coupling phase change heat transfer process and thermal stress behavior of biological tissue during cryosurgery are studied in the context of a generalized thermoelastic theory. The nonlinear governing equations are constructed while considering the variable thermal properties and solved by a time-domain finite element method based on the effective heat capacity formulation. A 2-D tumor and normal tissue model is adopted for simulating the freezing process in cryosurgery. The effects of temperature-dependent thermal properties and relaxation time on the responses of biological tissue are discussed and illustrated graphically. |
| Keywords: | Cryosurgery finite element method generalized thermoelastic theory phase change variable thermal properties |