正常人咽腔气体流场数值模拟

Air flow field numerical simulation and analysis on healthy people pharyngeal cavities

为研究人体咽腔内的气体流动状况,基于10名志愿者的螺旋CT医学图像,应用表面重建的方法对人咽腔进行三维重建,并采用有限单元法和有限体积法两种数值方法对志愿者吸气过程中咽腔中的气流场进行了数值模拟及分析.所建模型较真实地反映了咽腔实际解剖结构形态,有限单元法和有限体积法两种数值模拟方法计算结果相近,从数值模拟结果可以得到人体呼吸过程中气体流场在咽腔内压力与速度的分布规律.本研究对吸气时人咽腔中气体流动特性、临床上咽腔解剖结构相关疾病的诊断及发病机理等问题深入探讨具有参考价值.

To investigate characteristics of air flow in pharyngeal cavity, based on the data which came from the spiral CT images of the 10 volunteers, the 3D models of pharyngeal cavity were reconstructed by the method of surface rendering. And numerical simulation was performed for the air flow in those pharyngeal cavities using the finite element method （FEM） and finite volume method （FVM）. It is comparatively true that established model reflects the real anatomical configuration. The computed result obtained by the FEM was similar to that by FVM. From the results of the numerical simulation, the air flow distribution in the pharyngeal cavity in the course of inspiration was obtained. The numerical simulation can help study the character of air flow in the pharyngeal cavities, diagnose pharyngeal disease and research into the pathogenesis which is related to the anatomical structure of pharyngeal cavity.