Numerical simulation for analysis of thermal fluid dynamics issues
CFD (Computational Fluid Dynamics) simulates the internal and external fluid dynamics of process rooms and equipment and also facilitates the resolution of heat exchange problems. Using dedicated software, CFD resolves the equations which describe fluid dynamics Navier-Stokes equations, and overcomes the technological limits arising from the simplifications implied by the analytical solution of these functions. CFD is therefore an approach complementary to experimental and theoretical fluid dynamics, which uses alternative, less expensive means to test the motion of fluid systems, even in conditions in which any kind of measurement would otherwise be impossible or extremely difficult.
The benefits of CFD
CFD is a system which offers better results than the experimental measurement of fluids alone, a competitive advantage enhanced by the increased accessibility of technologies and skills.
Design simulation to analyse critical issues and optimise times and costs.
Analysis of the behaviour of existing systems to identify the causes of malfunctions.
Preliminary study of individual components to improve their functioning.
Analysis of criticalities and operating limits to enhance the system’s robustness, also in terms of energy saving.
WORKFLOW: the various phases of a CFD simulation
1. CREATION OF THE GEOMETRY
Geometrical modelling of the system with the aid of CAD software and study of possible simplifications, for example in case of symmetries.
2. SPACIAL DISCRETIZATION
Creation of the calculation mesh with dedicated software.
3. SOLUTION AND POST-PROCESSING
Discretization of the system of PDEs in algebraic form, solution of the system and analysis of the results.
4. VALIDATION OF RESULTS
Benchmarking to assess the degree of confidence provided by simulations. This may be via comparison with case studies or