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CFD analysis

Computational Fluid Dynamics (CFD) analyzes and solves problems involving gas or liquid flows. To analyze the fluid flows, numerical, or mathematical, solution methods are used.

Air Flow Simulation (HVAC)

The CFD method is often used in the development of cars, planes, rockets, for the process industry and for cooling systems - all of which depend on fluids to function at their best. The method can be very useful for areas that are expensive to test outside a laboratory. CFD allows us to model the flow of fluids using computational power.

When designing a car, one can use CFD analysis to find out how the airflow from one car affects another. What does the design have to say for performance, consumption and noise level? If a car has an aerodynamic and streamlined design, performance will increase while energy consumption is reduced. Heat loss, air flow and cooling are essential for aircraft, boats and space travel - but also for cooling systems for rooms, buildings and larger structures.

Air flow simulation in a duct

CFD is used in HVAC

Nordic Steel is the market leader in HVAC, and supplies projects where top quality ventilation systems are absolutely necessary. For the world's largest offshore wind farm, Doggerbank, Nordic Steel supplies ventilation ducts for the converter platforms. Ventilation is very important on this type of platform and the ventilation ducts must be of the very best quality.

CFD can be used to assess whether a room or building complies with optimal ventilation, through the quantification of critical variables. In addition, solutions can be tailored to different buildings. This ensures efficient operation of the ventilation systems, which leads to an extended lifetime and reduced costs.

Air flow simulation in a duct (HVAC)

By conducting a CFD study before the design process of a ventilation system begins, replacing tests with high-quality numerical simulations can directly contribute to time and cost reduction. CFD can also be used to estimate the optimal size of the HVAC system, leading to a reduction in both capital and operating expenses.

How CFD analysis works

Material type and desired properties are entered in the CFD data model. By placing the model in realistic surroundings and simulating influences, one can predict how equipment behaves in reality.

The method analyzes complex problems and the behavior of fluids and physical systems. A digital simulation is created that shows how the liquids flow and how they are affected by objects. It shows how temperature, pressure, density and velocity behave in a design.

You can also visualize how physics affects the model, which can help to optimize the design and detect necessary design changes in the early stages. Among other things, the tool can be used to find temperature trends and gradients, pressure drop, particle deposition, erosion and other flow engineering conditions.

When designing, for example, process equipment, it is important to find out how the equipment will behave under different operating conditions. By simulating operation of the equipment, one can see how physical conditions affect the model and make design changes early in the design phase. At least as important as ensuring a good design of the equipment, is to ensure the quality of the performance after a longer period of operation.

A CFD analysis can effectively give indications of how to optimize the performance of equipment by changing operating conditions or by making simple modifications.

CFD analysis can be used for:

  • Design optimization of process equipment and systems
  • Simulation and verification of prototypes and special equipment
  • Troubleshooting damage/malfunctions in existing equipment
  • Quality assurance of technical calculations, stress calculations and design
  • Modeling of physical processes (heat exchangers, piping systems etc)
  • Visualization of flow (CFD) and heat transfer of particle trajectories
  • Calculation of dust transport and particle separation

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