A CFD or Computational Fluid Dynamics study allows us to analyze problems that involve fluid flows such as air or water in a given space. In ventilation, it is crucial to carry out a CFD study to find the most suitable fans for the installation. At Casals you can count on our team for CFD simulation, which is necessary to carry out engineering projects.
What is meant by CFD?
Computational Fluid Dynamics (CFD) is a branch of fluid mechanics that uses numerical methods and algorithms to solve and analyze problems involving fluid flows. Computers are used to perform the calculations required to simulate the interaction of liquids and gases with surfaces defined by boundary conditions.
What is a CFD study for?
Computational Fluid Dynamics is used for different applications:
Design and optimization of ventilation systems, as well as validation of fire protection. This allows us at Casals Ventilación to carry out studies for ventilation and fire protection in parking lots, warehouses, underground spaces, etc.
Analysis of vehicle aerodynamics.
Simulation of flows in pipes and ducts.
Evaluation of the dispersion of contaminants in air and water. In the case of Casals, CFDs offer us a view of polluting elements in ppm (particles per million) in addition to speed, smoke, visibility and temperature reached.
What is the CFD simulation process?
PREPROCESSING
Geometry: definition of the calculation domain (the area in which the simulation will be carried out). In our CFD study department we begin the process with the modeling of the plants to be studied, converting the 2D plan to 3D.
Mesh: creation of a network of cells that cover the domain. The cells can be tetrahedral, hexahedral, prismatic, etc. Our CFDs do the calculation from tetrahedral cells.
Boundary conditions: specification of the conditions at the boundaries of the domain (entrance, exit, walls, etc.). Regarding Casals, we analyze the air inlets and outlets, as well as the obstacles that may exist in the plant to be studied.
SOLUTION
It is the processing carried out by the computer using numerical methods to solve the equations.
Equations: solving the Navier-Stokes equations that describe fluid flow.
Numerical methods: use of methods such as finite volume, finite elements or finite differences to discretize and solve the equations.
POSTPROCESSING
Visualization: generation of graphics and animations that show the behavior of the fluid. A summarized example of a CFD video:
Analysis: evaluation of results to understand flow, identify areas for improvement, and make design decisions. It is about the work of our engineers to offer the best possible solution and the most suitable fans.
The concentration of carbon monoxide (CO) in community car parks makes them classified as risky areas. Forced ventilation and an efficient detection system will be necessary.
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