Stern wave - reduction in wave making resistance

Discussion in 'Hydrodynamics and Aerodynamics' started by anuprdk, Jun 25, 2020.

  1. anuprdk
    Joined: May 2018
    Posts: 9
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    Location: india

    anuprdk Junior Member

    Hi

    I am modelling a dump barge that has dimensions 72 x 18 x 2.8 m in 2 m water at 1.4m draft. CFD simulations show the squat and trim of the vessel within acceptable limits but the trough wave at the stern is around 1 m compared to 0.7 m in forward. Consequently, the viscous pressure resistance and wave making resistance at the stern is on a higher side than at the forward. Please advise on how to reduce this without altering the length of the barge.
     

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  2. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    What is the shape of the barge?
     
  3. bajansailor
    Joined: Oct 2007
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    Location: Barbados

    bajansailor Marine Surveyor

    +1 re Gonzo's question - is the barge a rectangular brick with a bit of rake at the fore and aft ends, or a bit more streamlined?

    Are you really towing it in only 2 metres of water depth and a draft of 1.4 metres, thus giving a clearance under the keel of only 0.6 metres?
     
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  4. jehardiman
    Joined: Aug 2004
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    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    You know bad powering/sailing/maneuvering vessels are called a "barge" for a reason....right? That's what you get when you use a barge hull form. And water depth to draft isn't helping you any which is the reason for the high stern wave....have you ever looked at shallow water squat?
     
    bajansailor likes this.
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