1 / 4

Example: Turbulent flow around a cylinder

Example: Turbulent flow around a cylinder. Flow around a cylinder. Turbulent flow around a cylinder. Wall functions. U in , k and  specified. Free flow around a cylinder. Inlet velocity, Uin = 1.5 m/s. Cylinder diameter, d = 0.2 m. Air at ambient temperature, =1.5·10 -5 m 2 /s.

virgil
Télécharger la présentation

Example: Turbulent flow around a cylinder

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Example:Turbulent flow around a cylinder

  2. Flow around a cylinder Turbulent flow around a cylinder Wall functions Uin, k and  specified • Free flow around a cylinder. • Inlet velocity, Uin = 1.5 m/s. • Cylinder diameter, d = 0.2 m. • Air at ambient temperature, =1.5·10-5 m2/s. • Reynolds number, • Turbulence intensity at the inlet of 2%.

  3. Numerical considerations Turbulent flow around a cylinder • 900 nodes (1672 elements). • Iterative solution process requires approx. 60 MB memory. • Stabilization techniques: • Second order artificial diffusion and first order streamline diffusion for the k and  equations. • First order streamline diffusion for the momentum equations.

  4. Results Turbulent flow around a cylinder - Results • Point of seperation shows qualitative good agreement with literature. (120° from the impingement point). • Values of Cp seem to correlate well with experimental data. • The results are easily visualised with the postprocessing functionality built into COMSOL Multiphysics.

More Related