Computational Mechanics Research and Support for Aerodynamics ...

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Table of Contents 1. Introduction and Objectives ................................................................................................................. 8 1.1. Computational Fluid Dynamics Summary ........................................................................................ 8 2. Computational Fluid Dynamics for Hydraulic and Aerodynamic Research ........................................ 10 2.1. Pressure Flow Scour Formula Update for Highway Engineering Circular 18 ................................. 10 2.1.1. Testing the Theoretical Model for Pressure Flow Scour using CFD analysis, Initial Fit....... 12 2.1.2. Second Fit ............................................................................................................................ 15 2.1.3. Resolving Issues of the Second Fit ...................................................................................... 20 2.1.4. References .......................................................................................................................... 24 2.2. Modeling of the Wind Tunnel Laboratory at TFHRC ...................................................................... 24 2.3. Computational Modeling and Analysis of Flow through Large Culverts for Fish Passage ............. 25 2.3.1. Validation of the CFD models ............................................................................................. 25 2.3.1.1. Comparison of CFD results with experimental data...................................... 26 2.3.1.2. Model accuracy analysis ................................................................................ 49 2.3.1.3. Sources of the error ....................................................................................... 51 2.3.2. References .......................................................................................................................... 51 2.4. Modeling of Truck Generated Salt Spray under Bridge with Sliding Mesh ................................... 52 2.5. New Flume Design for Hydraulics Laboratory at TFHRC ................................................................ 52 2.6. Training and Technology Transfer ................................................................................................. 58 TRACC/TFHRC Y2Q2 Page 3
List of Figures Figure 2.1: Bridge deck geometry ............................................................................................................... 11 Figure 2.2: Symmetric section of bridge deck from center of a railing post to halfway to the next post .. 11 Figure 2.3 Vertical contraction and definition for geometric parameters. ................................................ 13 Figure 2.4 Initial fit based on Equations 2.2 and 2.3................................................................................... 14 Figure 2.5 Dividing streamline position for different flood heights ........................................................... 17 Figure 2.6 Dividing streamline position for different flood heights ........................................................... 18 Figure 2.7 CFD result for 3 different velocity levels .................................................................................... 19 Figure 2.8 Equation 2.6 at different velocity levels vs. CFD results ............................................................ 19 Figure 2.9 Equation 2.12 vs. CFD results .................................................................................................... 22 Figure 2.10 Equation 2.13 at different velocity levels (K=0.95) vs. CFD results.......................................... 23 Figure 2.11 Comparison between predicted scour (design scour depth) and experimentally measured scour depth ................................................................................................................................................. 24 Figure 2.12 Sketch of experimental model (left) and CAD model of culvert section (right) for bed elevation at 0 inch ....................................................................................................................................... 28 Figure 2.13 Comparison of CFD and PIV velocity contour under the condition of 0D bed elevation and 1.1 fps for 4.5inch water depth (velocity: 33.5 cm/s) ....................................................................................... 29 Figure 2.14 Comparison of CFD and PIV velocity contour under the condition of 0D bed elevation and 1.1 fps for 6 inch water depth (velocity: 33.5 cm/s) ......................................................................................... 30 Figure 2.15 Comparison of CFD and PIV velocity contour under the condition of 0D bed elevation and 1.1 fps for 9 inch water depth (velocity: 33.5 cm/s) ......................................................................................... 31 Figure 2.16 Comparison of CFD and PIV velocity contour under the condition of 0D bed elevation and 0.71 fps for 4.5 inch water depth (velocity: 21.6 cm/s) .............................................................................. 32 Figure 2.17 Comparison of CFD and PIV velocity contour under the condition of 0D bed elevation and 0.71 fps for 6 inch water depth (velocity:21.6 cm/s) .................................................................................. 33 Figure 2.18 Comparison of CFD and PIV velocity contour under the condition of 0D bed elevation and 0.71 fps for 9 inch water depth (velocity: 21.6 cm/s) ................................................................................. 34 TRACC/TFHRC Y2Q2 Page 4
Page 1 and 2: ANL/ESD/12-27 Energy Systems Divisi
Page 3: ANL/ESD/12-27 Computational Mechani
Page 7 and 8: Figure 2.35: Two different transiti
Page 9 and 10: 1. Introduction and Objectives The
Page 11 and 12: 2. Computational Fluid Dynamics for
Page 13 and 14: flat surface assumption is good exc
Page 15 and 16: conditions from Example 1 defined i
Page 17 and 18: scour rate is initially highest nea
Page 19 and 20: Figure 2.6 Dividing streamline posi
Page 21 and 22: 2.1.3. Resolving Issues of the Seco
Page 23 and 24: educe the rate of increase for y wh
Page 25 and 26: Design Scour Depth 0.400 0.350 0.30
Page 27 and 28: extend the impact of the findings t
Page 29 and 30: Table 2.2 Contour plots comparing C
Page 31 and 32: Figure 2.14 Comparison of CFD and P
Page 37 and 38: consistent with the lab test setup,
Page 51 and 52: RMSD area area ( V1 V2 ) n area 2
Page 53 and 54: 2. Marian Muste, Hao-Che Ho, Daniel
Page 55 and 56:
Honeycomb Streamline Trumpet Unifor
Page 57 and 58:
(a) Streamline trumpet transition c
Page 59 and 60:
2.6. Training and Technology Transf
Page 61:
Figure 2.40: Announcement for CFD t
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