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Page 1: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary

CFD Modeling and Simulation for theWaller Creek Tunnel/8th St. Lateral Junction

Alden Research Laboratory Inc.30 Shrewsbury St., Holden, MA

Preliminary Results

By:

Page 2: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary

CFD Model Geometry

Page 3: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary

103.41’100’Transition 50’

𝜙 = 16’

57.75’

𝜙 = 16’

Plan View

Profile View

A

A

B

B

Section A-A Section B-B10 ‘

10 ‘

21.169’19.1083’

R = 10.21’R = 11.175’

Θ = 45o

Page 4: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary

Boundary and Flow ConditionsTunnel Inflow

Outflow

Junction Inflow

Page 5: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary

Computational Mesh: ~ 310,000 cells

Page 6: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary

Waller Creek (WC) Tunnel Flow Scenarios

Return Period 1 yr 2 yr 5 yr 10 yr 100 yr 500 yr

Proposed - Lag Tunnel / Peak Intervening Flow ( 8th Street Lateral Junction)

Tunnel Flow (12th St. Inlet) 632 979 1972 2743 4693 6208

8th St. Connector Tunnel Flow 260 335 547 700 1258 1701

% Flow of 8th St. Connector Tunnel 41.1% 34.2% 27.7% 25.5% 26.8% 27.4%

Proposed - Lag Tunnel / Peak Intervening Flow ( 4th Street Lateral Junction)

Tunnel Flow (12th St. Inlet + 8th St. Inlet) 892 1314 2519 3443 5951 7909

4th St. Connector Tunnel Flow 194 239 361 447 763 1015

% Flow of 4th St. Connector Tunnel 21.7% 18.2% 14.3% 13.0% 12.8% 12.8%

Flow Scenarios:

Page 7: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary

Lag Tunnel / Peak Intervening Flow( 8th Street Lateral Junction)

100 Year Return Period

(Uniform Inflow at Lateral Junction Inlet)

Page 8: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 9: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 10: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary

Lag Tunnel / Peak Intervening Flow( 8th Street Lateral Junction)

1 Year Return Period

(Non-uniform Inflow at Lateral Junction Inlet)

Page 11: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 12: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 13: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 14: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 15: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 16: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 17: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary

Lag Tunnel / Peak Intervening Flow( 8th Street Lateral Junction)

1 Year Return Period

(Uniform Inflow at Lateral Junction Inlet)

Page 18: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 19: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 20: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 21: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 22: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary
Page 23: CFD Modeling and Simulation for the Waller Creek Tunnel/8 th St. Lateral Junction Alden Research Laboratory Inc. 30 Shrewsbury St., Holden, MA Preliminary

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