CFD analysis

Pezy Group offers CFD analysis as part of their engineering services. This digital heat and flow analysis provides insight in:

  • Thermal management of machinery and equipment
  • Flow behaviour of air, gases or liquids in cavities and around objects
  • Hydraulic resistance or drag of complex geometries

What is CFD?

Computational Fluid Dynamics (CFD) is a method used to simulate the behaviour of a fluid system (liquid or gases). Known parameters such as velocities, temperature and/or heat sources are input for the analysis and form boundary conditions. Simulation software then calculates velocity, temperature, heat transfer and other unknown parameters. CFD simulates the behaviour of the system and can be used to explore and compare alternative designs. For example:

  • Hydraulic resistance (pressure drop) in valves, filters, etc.
  • Flow fields (rotating equipment, pumps, fans, cyclones)
  • Thermal management and heat transfer
  • Electronics cooling
  • Mixing process (burner gas mixing chamber, etc.)
  • Force prediction (wind drag, etc.)
  • Food Processing Equipment (fryer, etc.)
  • Two-phase flow (fluid flow with droplets/solid particles)
  • Particle studies

Our area of expertise in which CFD is applied is called “Modeling & Simulation”. It requires a lot of theoretical knowledge and experience in order to model a real-life situation, and to correctly interpret the results of a CFD analysis. We have both the experience and the expertise to properly perform CFD simulations. Some examples of previous projects are listed below.

Wind drag load

We have developed an adapter for Fugro RailData that allows the RILA measuring system to be attached to British high-speed trains. The adapter must be suitable for speeds up to 200 km/h combined with wind speeds up to 8 till 12 Beaufort. Since the RILA system is attached to the front of the train, the geometry of the train has a large impact on the wind loads on the RILA cabinet. We determined the wind loads with CFD analysis as an alternative to conservative hand calculations. The CFD results were important input  to optimize the design and minimize the weight of the adapter.

Pillow plate heat exchanger

A pillow plate is a side panel of a heat exchanger, which resembles the shape of a pillow. The pillow plate is composed of two flat metal plates which are locally welded together and are inflated under high pressure. The pressure and the resulting plastic deformations in the plates are difficult to simulate. As a result it is nearly impossible to determine the relationship between the sheet blank, semi-finished product and final product. We developed a unique method to model this relationship. Combining CFD and nonlinear FEM analysis helped us to determine the optimal geometry for sufficient heat transfer with a low drop in pressure in the pillow plates.

Solid Cyclone Separator

Cyclones are popular separators used to separate particles from air. They are used in different industrial sectors, mostly as pre-separator for other filters. The main advantages are a simple design with non-moving parts, low investment and operating costs, and a high degree of purification.

Despite the simple design and principle of operation, the air flow inside the cyclone is complicated by high turbulence with a pronounced three-dimensional pattern acfd-cyclone-cycloonnd unstable air swirls. Due to the lack of good flow theory, new cyclones are designed with empirical data or minor modifications of existing cyclones. For new designs or optimization, expensive tests  and  prototypes are unavoidable.

Our CFD simulations of cyclones helps to get a better understanding of the intricate flow field and the interaction of the particles with the walls. Next to that it results in a qualitative assessment of the hydraulic resistance (pressure drop) and the degree of air purification (cyclone efficiency) in different particle sizes. This technique can also be used for other types of separators and clean rooms.

Synonyms are: dust cyclone, centrifugal separator, vortex separation, multi cyclone, hydro cyclone.

Would like to discover the added value of CFD for your project? Don’t hesitate to contact us.

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