Obtención de velocidad con una simulación de dinámica de fluidos computacional: método de comprobación teórica

Computational fluid dynamics (CFD) is a tool used to solve problems about the behaviour of a fluid within a particular geometry in different fields by considering properties such as pressure, density, and velocity. For example, it is often used in the development of engines, turbines, hydraulic distribution systems, among others. This study analysed a water pipe with a reduction in diameter and different pressures along the system. The purpose of this paper is to estimate the effectiveness of this tool using a system of equations based on the principle of continuity and the principle of Bernoulli to calculate the entry and exit velocities by taking into account the changes in diameter of the pipe. Additionally, a simulation of computational fluid dynamics was generated in the Fluent software using a laminar flow model to compute a solution in order to compare the speeds obtained by this CFD simulation and the system of equations mentioned above. A scatter graph was made with the values obtained by the system of equations and the simulation, with an R2 of 0.9 and an average precision of 95.12% in entry speed and 95.11% in exit speed.