Numerical modeling of the effect of emerged aquatic canopy on water flow - presenting an applied method

Abstract

At the beginning of this research, we examined the history of botany, expressed hypotheses, presented related basic equations, described flow simulation based on geometrical information, and reviewed numerical and laboratory studies related to flow simulation in the presence of aquatic plants. Field observations show that the presence of aquatic plants can disrupt local water flows and disrupt the local flow by providing new conditions. According to the necessary capabilities, among several numerical models, numerical modeling in FLOW 3D software , and its simulation in the porous medium have been selected. in modeling with FLOW 3D softwareMany variables such as physical conditions, type of current, timing, porosity coefficient, network dimensions, boundary conditions, etc. can be changed. In this research, the network dimensions, boundary conditions, and timing were analyzed for sensitivity by implementing the program and numerical modeling. After examining the physical conditions of the problem, we have investigated the flow rate in the porous medium in comparison with the flow rate in the presence of plant density which has been investigated in the laboratory environment in the past. In this way, firstly, in the FLOW 3D software , we examined different n between 0-1 in the porous medium , and then we compared the u/u10 ratio with different porosity coefficients in the model with the u/u10 output from the laboratory in different plant densities. We presented n-φ diagrams. In this model, by examining the parameter n, the porous mediumgeneralized with the environment of vegetation and by changing it, we have extracted the coefficient proportional to the density.