Fluids

Fluids

Ship hull with dual flows (external and internal)

    • haniysf
      Subscriber
      Hello,nI?m trying to simulate a case where a ship hull has ducts to communicate front water from the bow region to the propeller at the stern to reduce wave-making drag. In this scenario there are 2 flows affecting the hull, external (the ambient water) and, internal (the suction of the water by the propeller through the ducts) any advice about the setup will be appreciated.n
    • Surya Deb
      Ansys Employee
      Hello, nWill it be possible to decouple the effects of external and internal water before you run the entire simulation?nThe external influence can be taken care of the VOF with open channel flow and sharp interface settings. Of course, you will need 6 DOF with Dynamic Mesh solver to estimate the motion of the boat hull due to wave impact. The mesh near the hull can also be dynamically adapted to provide accurate estimate of the drag forces. nGenerally SST K-omega type of turbulence model with turbulence damping can be used for this.nHow does the internal flow of water react with the propeller? What happens to it after it interacts?nDoes it get out and fall into the ambient and thus form a continuous loop?nRegards,nSuryann
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