فهرست نشریات علمی دسترسی آزاد ایران

Using Fluid-Solid Interactions (FSI), this study presents the proper configuration and Boundary Conditions (BC) for precise prediction of shape and cardiac performance of human heart during diastole. The judgment is based upon comparison of deformations and volume change of left ventricle plus atrium with CT scan images for a healthy person. Usage of correct BC for left ventricle plus atrium provides more accurate results, in terms of volume of left ventricle variations compared to real values and differences are less than 1.3%. Also, shape change of ventricle compares well with scanned images. Three different configurations are constructed from CT images as initial geometries: model A; left ventricle with thick ventricular wall and mitral valve, as an example of hypertrophic case, model B; the original left ventricle and mitral valve from scanned images and model C, which is the model B plus the original atrium geometry. Using unsteady FSI, the difference of experimental numerical ventricle volumes is expectedly large for model A, due to hypertrophy. The difference between numerical results and experiments is 6% for model B and 1.25%, for the more complete model C. Therefore, closer agreement of model C with experiment and its feasibility for more involved cases is shown.