1 / 10

Activities of UPB

Activities of UPB. Dipl.-Ing. Mark Piper. Research tasks of UPB. Investigation of velocity and temperature fields with CFD Determination of HTC and specific pressure loss Development of design methods: Nu=f(Re,Pr,geometry .); ξ =f(Re,geometry)

clay
Télécharger la présentation

Activities of UPB

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. Activitiesof UPB Dipl.-Ing. Mark Piper

  2. Research tasks of UPB • Investigation of velocity and temperature fields with CFD • Determination of HTC and specific pressure loss • Development of design methods: Nu=f(Re,Pr,geometry.); ξ=f(Re,geometry) • Geometry optimisation with regards to heat transfer and pressure loss

  3. Spacer geometry: characterisation fil fil Filament diameter: 0.5 mm Angle: 65°, 115° Mergence: 0.1 mm Filament diameter: 1.3 mm Angle: 45°, 135° Mergence: 0.6 mm  5 degrees of freedom

  4. Computational domain • Selection of a characteristic representative element • Geometry approximation with CAD (NX Unigraphics 6.0 - Siemens PLM Software): Initial assumptions: plane channel (curvature neglected), wall temperature asymmetry neglected (external boundaries are adiabatic) • Surface and volume meshing with Star-CCM+ (5.04.006) • Grid refinement in near wall boundary layer regions Surface and volume meshing

  5. Simulation plan for several spacer geometries Configuration 1 Configuration 2 Configuration 3 Configuration 4 Double 1 Double 2 Type Figure Length fil

  6. Boundary conditions • Characteristic representative simulation element

  7. First simulation results  CFD-visualisation for double configuration 4: Temperature field on spacer walls and velocity streamlines on the cold side  CFD-visualisation for double configuration 4: Temperature field on the cold side

  8. First simulation results  specific pressure loss comparison for the different configurations Configuration 1 Configuration 2 Configuration 3 Configuration 4 Calculated with pressure loss equation Volume flow [l/min] Experiment Makatec • simulated vs. experimental • pressure loss • for Configuration 1 Pressure loss (mbar) Discrepancies that need to be clarified Volume flow [l/min]

  9. Future work • Grid independency study and optimisation • Reduction of numerical errors • Reduction of cell number (coarse grid where possible) • Simulation studies • Variation of spacer geometrical parameters • Variation of process parameters: inlet velocities and temperatures

  10. Thank you

More Related