Turbulence models for a wide range of flow phenomena
Turbulence directly affects all the in-cylinder processes and the modeling of turbulence and its effect on the flow, mixing, fuel evaporation and combustion are critical to engine performance. STAR-CD is equipped with a range of turbulence models that have been extensively validated for in-cylinder engine simulation.
  • Fuel injection during intake for a DI gasoline engine 2
  • Fuel injection during intake for a DI gasoline engine 1
  • Summary of STAR-CD and es-ice capabilities : to keep pace with developments in engine technology, CD-adapco is continuously developing the software to add new capabilities and functionality
  • Summary of STAR-CD and es-ice capabilities : to keep pace with developments in engine technology, CD-adapco is continuously developing the software to add new capabilities and functionality

Reynolds Averaged Navier Stokes (RANS) models are used predominately in engine applications. Appropriate variants of the standard k-ε model including linear and non-linear groups, as well as k-ω models are incorporated in STAR-CD to account for compression induced strain on the turbulence field, low Reynolds number effects and heat transfer.

When more detailed capture of turbulent flow structures is required, STAR-CD has a number of options for both LES and DES modeling. For LES, the Smagorinsky, dynamic Smagorinsky and WALE subgrid models are available. For DES, the latest delayed and improved delayed detached eddy simulation models are available for both k--ε and k-ω variants. Finally, the synthetic eddy method for the specification of realistic inflow boundary conditions is available for both LES and DES.

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