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 In the present thesis, the computational fluid dynamics method is applied to study the scale effect problem of the form factor. In this method, the turbulent flow around ship hull is analyzed by solving the Reynolds-averaged Navier-Stoke equation using the finite volume method. The space parallelism and a PC-cluster with 16 nodes are employed to speed up the computations.First, the applied method is verified at model-scale by comparing the calculated results with the measured data from the model tests. The grid dependency problem is studied by refining the grids systematically. It improves the reliability of the numerical approach and makes that the present method has the ability to predict the ship flow. The prediction is verified using the model test which is performed subsequently. Moreover, the full-scale ship flow is also computed and compared to the model-scale ship flow in this thesis. The resistance predictions at full-scale are indirectly verified through the qualitative comparisons of the important flow properties at different scales.In the last part of the present thesis, the resistance of several kinds of surface ship and sub-body are computed at different Reynolds numbers. By comparing the calculated results in this thesis, the scale effect problems of the form factor are discussed. Reviewing all calculated results, a unique trend among all hull forms is observed in the specific range of Reynolds number. As Reynolds number increases, the ratio of the pressure term to the total resistance increases, and the form factor also increases slightly.
 1. Introduction 11.1. Form Factor and Scale Effect 11.2. CFD in Ship Resistance Prediction 21.3. Researches of Scale Effect Problem 41.4. Focal Points of the Present Thesis 62. Applied Method 92.1. Governing Equations 92.2. Turbulence Modeling 112.3. Numerical Method 142.3.1. Finite Volume Method 142.3.2. Calculation of Pressure 142.3.3. Free-Surface Treatment 152.3.4. Wall Function 162.3.5. Blending Factor 172.3.6. CFD Solver 172.4. Computational Space and Boundary Condition 182.5. Parallel Processing 202.6. PC-Cluster 222.6.1. Initial Configuration 222.6.2. Bottleneck of Parallelization Efficiency 222.6.3. Benchmark of the PC-Cluster 233. Verification of Model-Scale Ship Flow 273.1. Verification of Simplified Hull Form 283.2. Verification of Practical Hull Form 323.2.1. Case Description 323.2.2. Arrangement of Numerical Grids 333.2.3. Verification of Total Resistance 343.2.4. Verification of Free-Surface Wave System 353.2.5. Verification of Wake Distribution 403.3. Assessment of Efficient Grid Arrangement 423.3.1. Grid Dependency 423.3.2. Systematic Grid Refinement 423.3.3. Grid Dependency on Free-Surface Waves 443.3.4. Grid Dependency on Wake Distribution 493.4. Preliminary Test of k-ω Model 553.5. Test of Predicting Capability 563.5.1. Case Description 563.5.2. Verification of Resistance 573.5.3. Verification of Wake at Propeller Plane 603.5.4. Re-Computations using Standard k-�� Model 614. Verification of Full-Scale Ship Flow 634.1. Case Description 634.2. Grid Strategy 654.3. Verification of Wake Distribution 664.3.1. Wake Field behind Submarine 664.3.2. Wake Distribution at Propeller Plane 664.4. Verification of Pressure Distribution 694.5. Verification of Free-Surface Waves 724.6. Verification of Resistance Components 785. Study on Scale Effect of Form Factor 795.1. Case Description 795.2. Skin Friction of Flat Plate 815.3. Scale Effect of Resistance Components 845.4. Scale Effect of Form Factor 896. Conclusions 947. References 96
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