1 / 11

CIMMSE TC Wind Group Conference Call

CIMMSE TC Wind Group Conference Call. Wednesday, June 5 th , 2013 11:00 AM. Agenda. Improved modified Rankine vortex interpolated wind images Modeling Focus Literature review Goals of simulations Initial WRF-LES setup. Improved Modified Rankine Vortex Interpolated Wind Images.

Télécharger la présentation

CIMMSE TC Wind Group Conference Call

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. CIMMSE TC Wind GroupConference Call Wednesday, June 5th, 2013 11:00 AM

  2. Agenda • Improved modified Rankine vortex interpolated wind images • Modeling Focus • Literature review • Goals of simulations • Initial WRF-LES setup

  3. Improved Modified Rankine Vortex Interpolated Wind Images • Jonathan had requested images of some of the storms with the improved error function be posted online/be made available for download • Select images have been posted to: https://sites.google.com/a/ncsu.edu/modified-_rankine_improvements/ • Collaborators are encouraged to examine images and provide comments • Where to go from here in terms of R2O?

  4. Modeling Focus • Climatology aspect of the study has largely been completed • Gust factors as a function of sustained wind speed, wind direction, and distance from coastline using ASOS data • NDFD verification of recent storms impacting the region • Potential improvement to the wind interpolation method used in the TCMWindTool • Now can approach from more of a dynamical perspective with aid of WRF • WRF-LES option as of WRF V3

  5. Resolved  Subgrid Large-Eddy Simulation (LES) Subgrid Resolved Log(Ek) kc = /f Log(k) Physical Space Fourier Space (Courtesy: Dr. Sukanta Basu, NC State)

  6. Literature Review • WRF-LES has been used quite frequently in operational community for examining small scale turbulence in the boundary layer • Very few studies have used WRF-LES for tropical cyclones

  7. Modeling Goals/Focuses • Use Irene (2011) as a first case study • Conducted 24 hour WRF-LES simulation near location of landfall beginning at 0000 UTC 27 August • Examine large eddy circulations within the boundary layer • Conduct TKE budget to explore relative magnitude of contributions of the various terms • Examine gust factors at various locations within inner domain (compare to the climatology analysis we have conducted) • Sensitivity studies • Lower level stability • Storm intensity • Other suggestions?

  8. Modeling Setup • 5 Domains, with innermost two domains having no PBL scheme • Use of 1/16° daily SST analyses, 0.5° six hourly GFS analyses for boundary conditions • Grid Spacing (consistent with Zhu et al. 2008): • D1: 8.1 km D3: 900 m D5: 100 m • D2: 2.7 km D4: 300 m

  9. DiscussionNext Conference Call: Wednesday, July 10th, 2013 11 AM

More Related