State of the art flow simulation using CFD calculation
Even with modern hardware, turbulent flows can only be represented approximately. The accuracy of the CFD simulation depends on the turbulence model, which has to be selected according to the respective requirements of the flow simulation. For this purpose, a profound knowledge and a certain experience of the calculation engineer is required. A complex CFD analysis, depending on the size of the model and the application, easily leads to immense calculation times. However, our experienced specialists always select the parameters for the CFD calculation that are appropriate to the needs of our customers. Only in this way can the desired flow effects be represented. Furthermore, by coupling the CFD calculation with a FE- Analysis within the framework of an FSI simulation (fluid-structure interaction), to map interactions between flow and structural mechanics.
Procedure for securing the function of your products by CFD simulation
To ensure the optimal functioning of your products, we take a close look at the flow volume limited by the respective components.
Depending on the requirements and specifications for the flow conditions to be investigated within the scope of the CFD analysis, we reproduce reality in the best possible way by selecting the appropriate flow model using appropriate approximations. On request, we contact testing institutes and facilities to determine the respective requirements of the tests or inspections to be carried out and to design your product accordingly. These parameters are used as boundary conditions for the CFD calculation in the form of velocities, mass flows and/or temperatures.
Determination of the substance data for CFD analysis
The accuracy and quality of the results of the flow simulation usually depend on the density, viscosity and also the heat capacity of the fluid used in the temperature range valid for the simulation. We usually take the required material data for all common fluids from the relevant technical literature, unless the data is provided by our customers.
Failure criteria for the evaluation of the CFD simulation
Customer-side criteria are usually specified for the failure assessment of the flow conditions. Corresponding criteria are, for example, pressure loss, mixing ratios and substance concentrations in multi-phase flow, upper temperature limits or particle distributions in certain areas of the flow space (e.g. deposits at the bottom of a tank).