Sail's 2D Section Drag & Surface Roughness

Discussion in 'Hydrodynamics and Aerodynamics' started by Erwan, Jun 2, 2024.

  1. Erwan
    Joined: Oct 2005
    Posts: 462
    Likes: 29, Points: 28, Legacy Rep: 97
    Location: France

    Erwan Senior Member

    Hi,
    Probably a rookie question for CFD specialists:
    For instance I wonder what would be the difference in 2D section drag between
    1- Moth luff pocket sail with all the sewings of the actual sail
    2- A Virtual sistership sail, but with "perfect" surface roughness, similar to monofilm sail fabric for instance.
    I have been investigating TurbulentBoundary Layers/ Turbulent Kinetic Dissipation/ among others, but could not find any workpapers adressing the "Surface Roughness" in the context of Turbulent Boundary Layers.
    Thanks in advance for your "enlightments"
    Regards
    E
     
  2. Remmlinger
    Joined: Jan 2011
    Posts: 315
    Likes: 58, Points: 28, Legacy Rep: 172
    Location: Germany

    Remmlinger engineer

  3. Erwan
    Joined: Oct 2005
    Posts: 462
    Likes: 29, Points: 28, Legacy Rep: 97
    Location: France

    Erwan Senior Member

    Thank You so much Remmlinger,
    Ironicaly I have the Hoerner's Fluid Dynamic Lift book, and I thought it was "The Hoerner's".
    So now, I have two 500 pages fluid dynamic books, as a result, rainning sundays will not be boring days anymore.
    Thank you again, and continue to post your great research, with Mikka's posts your are my prefered BDN 's reading.
    From Manfred Curry to Hoerner via Horten brothers, it seems you have some well established traditions, in addition to Oktober Fest.
    Fair wind and thank you again
    Best Regards
    Erwan
     
    Remmlinger likes this.
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