In this study, the formation of the shear stress on the three-dimensional realistic health and dissected aortic dissection models is investigated under the laminar Newtonian flow assumption with Reynolds numbers 100 to 600. Numerical simulation shows that In this study, the formation of the shear stress on the three-dimensional realistic health and dissected aortic dissection models is investigated under the laminar Newtonian flow assumption with Reynolds numbers 100 to 600. Numerical simulation shows that