Simulate atomization at multiple scales
Virtual test bench using particle-based hydrodynamics
Exhibitors
Location
Hall 11, Stand B06
Description
The flow of liquids and gases plays a decisive role in numerous processes. One example is gasoline and diesel injection in internal combustion engines, which significantly influences the formation of environmentally harmful nitrogen oxides and soot. Computer-aided simulations of such flows support this development work considerably. Currently, mainly grid-based simulation methods are used for this purpose, in which the phases – liquid or gaseous materials – are represented as volume fractions in grid structures. In complex problems, such as fuel injection, the grid has to be moved along with the interface between liquid and gas, which requires enormous computing power. For technically relevant multiphase flows, this methodology reaches its limits. Scientists of KIT have chosen an extended approach. They have developed a simulation method based on the numerical procedure "Smoothed Particle Hydrodynamics" (SPH). In this method, fluids and gases are divided into mass packages – called particles – which move according to the laws of fluid mechanics. Through the movement and interaction of individual particles, flow fields can be simulated realistically. Due to the "grid freedom", complicated boundaries and interfaces that are subject to strong deformation can be easily realized. Currently, the method is used to simulate and optimize fuel injection nozzles of aircraft engines.
Based on this approach, a virtual test bench has been developed that includes all important steps of flow simulation: from the preparation of the CAD data of the injection nozzle in preprocessing to the computation of the flow and visualization in postprocessing.
You can get an overview of this technology at KIT stand. More details can be exchanged individually with the responsible scientific employees of KIT after the industry fair.
Contact
Karlsruher Institut für Technologie (KIT)
- Kaiserstr. 12
- 76131 Karlsruhe
- Germany
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