Numerical Simulation Of Water Transport In Plant Xylem

With the development of the computer technology, the software of CFD (Computational Fluid Dynamics) makes a revolutionary change by the field of numerical simulation. It has a great value of researching and developing prospects that CFD is applied in the field of numerical simulation of water transport in xylem of the plant.The structure of xylem and its mechanism of water transport have been concerned by many plant physiological ecologists. The character of xylem determines the amount of water transport and transpiration. The study of water transport in vessel with perforation plate is the basic and the key content in xylem of the plant. The main research contents in this thesis include:1. In order to study the relationship of water transport in various parts of plant, amount of literatures are consulted. This dissertation outlines the basic structures of xylem including pits, perforation plates and wall thickenings phenomena. Perforated plates evolved from the pits are important to the water transport mechanism.2. This dissertation has a biopsy test with living plant roots, stems, leaves and etc for confirming the position of perforation plates, vessel size and other parameters of plant xylem. Three-dimensional structures of vessel are modeled with data collecting in the experiment.3. Considering the micro-flow characters of water transport in vessels for basic study of water flow in the area of perforation plates, such as solving the CFD numerical simulation Computational domain, establishing control equations, selecting the appropriate laminar flow model, finding the solution of the equations, setting right boundary conditions.4. This dissertation has a CFD numerical simulation of plant xylem with 5-pros and 20-pros perforation plate according to appropriate parameters, finishing the analysis of the micro-flow situation of the models and comparing the results with other studies in order to confirm the feasible of this method.