Computational Mechanics Research and Support for Aerodynamics ...
Computational Mechanics Research and Support for Aerodynamics ... Computational Mechanics Research and Support for Aerodynamics ...
Table of Contents 1. Introduction and Objectives ................................................................................................................. 8 1.1. Computational Fluid Dynamics Summary ........................................................................................ 8 1.2. Computational Multiphyics Mechanics Summary ........................................................................... 9 2. Computational Fluid Dynamics for Hydraulic and Aerodynamic Research ........................................ 11 2.1. Entrainment Functions for RANS Scour Models and Tests of Alternatives ................................... 11 2.2. Initial Test of Mesh Morphing Applied to Transient Clear Water Pressure Flow Scour ................ 13 2.2.1. References .......................................................................................................................... 16 2.3. Computational Modeling and Analysis of Flow through Large Culverts for Fish Passage ............. 16 2.3.1. Model of Culvert Section with Fully Developed Flow Using Cyclic Boundary Conditions .. 18 2.3.2. Mesh Refinement Study ...................................................................................................... 19 2.3.3. Simulation Results and Discussion ...................................................................................... 22 2.3.4. Three Dimensional Model of Culvert Flume with Comparison to Experimental Results ... 30 2.3.5. Flow Conditions ................................................................................................................... 31 2.3.6. Results Using VOF Multiphase Model ................................................................................. 32 2.3.7. Comparison with the Single Phase Model .......................................................................... 33 2.3.8. Comparison with Laboratory Data ...................................................................................... 34 2.3.9. References .......................................................................................................................... 39 3. Computational Multiphysics Mechanics Applications ........................................................................ 40 3.1. Multiphysics Simulation of Salt Spray Transport ........................................................................... 40 3.1.1. Estimate for Water Content in Semi-Trailer Truck’s Wake ................................................. 40 3.1.2. Simulation of a Semi-trailer Truck Passing Through a Bridge Underpass ........................... 45 3.2. Wind Engineering ........................................................................................................................... 54 3.2.1. Vehicle Stability under High Wind Loadings ....................................................................... 55 3.2.2. Electromagnetic Shock Absorber for Vehicle Stability under High Wind Conditions ......... 65 3.3. A Coupling of CFD and CSM Codes for Scour Shape Prediction..................................................... 71 3.3.1. Introduction ........................................................................................................................ 71 3.3.2. Scour Slope Stability Based on Soil Mechanics ................................................................... 71 3.3.3. Procedure Flowchart ........................................................................................................... 72
3.3.4. Simplifying Assumptions ..................................................................................................... 73 3.3.5. Example of Use of the Procedure ....................................................................................... 73 TRACC/TFHRC Y1Q3 Page 3
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- Page 5: Computational Mechanics Research an
- Page 9 and 10: Figure 2.22: Velocity distribution
- Page 11 and 12: List of Tables Table 2.1: Boundary
- Page 13 and 14: experiments at TFHRC continued. A m
- Page 15 and 16: 2. Computational Fluid Dynamics for
- Page 17 and 18: ( ) ( ) (2.8) where A 0, A 1, and n
- Page 19 and 20: efine the rate function to improve
- Page 21 and 22: The objective of this work is to de
- Page 23 and 24: 2.3.2. Mesh Refinement Study As det
- Page 25 and 26: Table 2.2: Details of the various m
- Page 27 and 28: indicating the surface averaged vel
- Page 29 and 30: Figure 2.13: Line probes created at
- Page 31 and 32: In Figure 2.15 the velocity and the
- Page 33 and 34: Mesh 1 Mesh 2 Mesh 3 Mesh 4 Mesh 5
- Page 35 and 36: Figure 2.20: Dimensional details of
- Page 37 and 38: Figure 2.22: Velocity distribution
- Page 39 and 40: Figure 2.25: CFD velocity contour p
- Page 41 and 42: Figure 2.27: CFD velocity contour p
- Page 43 and 44: Conclusions for Comparison with Exp
- Page 45 and 46: 3.1.1.1. Approach To date, an initi
- Page 47 and 48: Figure 3.4: Sampling domain [3] A c
- Page 49 and 50: present. In addition during the sum
- Page 51 and 52: For each level, the figures below s
- Page 53 and 54: 0.0 sec 0.5 sec 1.0 sec 1.5 sec 2.0
- Page 55 and 56: 0.5 sec 1.0 sec 1.5 sec 2.0 sec 3.0
3.3.4. Simplifying Assumptions ..................................................................................................... 73<br />
3.3.5. Example of Use of the Procedure ....................................................................................... 73<br />
TRACC/TFHRC Y1Q3 Page 3
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