Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
COMPARISON BETWEEN PENNES AND DUAL PHASE LAG MODELS FOR THE BIOHEAT TRANSFER AROUND A HEALTHY AND A TUMOROUS THYROID
Submission Author:
Tiago Pereira da Costa Bittencourt , RJ
Co-Authors:
Tiago Pereira da Costa Bittencourt, Leonardo Antonio Bermeo Varon, Helcio Orlande
Presenter: Tiago Pereira da Costa Bittencourt
doi://10.26678/ABCM.COBEM2017.COB17-1527
Abstract
This work aims to compare two bioheat transfer models – Pennes and Dual Phase Lag (DPL) models – in the computational analysis of temperature distribution around the thyroid region. This work focuses on the detection of thyroid tumors using measurements of superficial temperature taken from the cervical region. Comsol Multiphysics software was chosen as the simulation platform. Two geometries were utilized in the simulations – normal and deformed ones. The simulated experiment consisted of the application of a thermal stimulation (cooling) on the skin surface of the cervical region, followed by natural heating of the analyzed region at room temperature. This work focused on two approaches: the geometry and the tumor effects on the superficial temperature distribution. The conclusions were that Pennes and Dual Phase Lag models describe similarly the temperature distribution along the analyzed region. As the relaxation and thermalization times increase, the temperature profiles are shifted down, but maintaining the same pattern. Finally, the results obtained in this work did not reveal any thermal pattern at the skin surface to which could be related the presence of thyroid tumors.
Keywords
Pennes, Dual Phase Lag, bioheat transfer, thyroid, cancer
