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Numerical Simulation of Free Surface Flows Using Unstructured Grids

Najafi, Saeed | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40290 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Seif, Mohammad Saeed; Nouri Borujerdi, Ali
  7. Abstract:
  8. The Present Study Deals With The Numerical Modeling Of Free Surface Flows Using Unstructured Grids, That Is An Extension Of Later Studies At Research Institute Of Marine Engineering With The Goal Of Developing A Robust CFD Code. One Of The Most Applicable Aspects Of This Software Is Simulation Of Ship Maneuver And Calculation Of Hydrodynamic Resistance Of Floating Structures That Arises From Combination Of Equations Governing The Flow And 6DOF Rigid Body Equations. This Study Represents Some Proposed Algorithms For Solving Navier-Stokes Equations, Volume Fraction Equation And Rigid Body Equations In A Time Marching Manner. These Equations Are Discretized Based On A Collocated Arrangement For Non-Orthogonal Unstructured Grids Using The Fractional Step Method. Therefore, In Every Time Step, The Grid Joined To The Body Is Moved Regarding Ship Movements And The Equations Governing The Flow Are Subsequently Solved. Accordingly, The Mentioned Software Is Developed And Its Accuracy Is Validated With Performing Different Simulations. This Software Is A Suitable Program For Simulating The Ship Maneuvers And Can Be Used Whether In Design Process Or Exploiting The Ship.
  9. Keywords:
  10. Computational Fluid Dynamics (CFD) ; Unstructured Grid ; Free Surface Modeling ; Ship Maneuver Simulating ; Fractional Step Method

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