Computational fluid dynamics in the numerical simulation analysis of end-to-side anastomosis for coarctation of the aorta

With the development of computing technology, numerical calculation has been widely used to simulate complex flows of various real shapes. The core task of computational fluid dynamics (CFD) is to solve the problem by numerical discretization and solution approaches in order to obtain the numerical solution of the discrete time/space points in the flow field. Due to the strengthening of cooperation among different disciplines, CFD has been widely used in the fields of hemodynamic assessment, post-operative regional blood flow evaluation and surgical simulation. Based on the development of medical imaging technology and its corresponding medical processing software, the numerical simulation of blood flow by CFD method has been widely popularized. Hence, the investigators attempted to determine the right combination point and set reasonable calculation conditions, in order to numerically simulate different surgical procedures for coarctation of the aorta (CoA), and further analyze the indexes. This would be helpful for the surgeon to have certain sensory verification before and after the operation, and select the best operation plan. The general structure of the CFD software includes three parts: pre-processing, solver, and post-processing (1). Pre-processing includes the geometric model and mesh partition (2). Solver mainly consists of the control equations for determining the CFD method, the proper discrete method, and the proper numerical calculation method and the related parameters to input (3). Post-processing refers to the CFD calculation, in which the results displayed are carried out separately, and there is no interaction between these two