Department of Estuarine and Ocean Sciences Seminar Announcement - Kayan Ulgen
When: Wednesday,
September 28, 2022
12:30 PM
-
1:30 PM
Where: > See description for location
Description: The School for Marine Science and Technology
Department of Estuarine and Ocean Sciences
Seminar Announcement
"Hydrodynamic Performance of a Catamaran in Shallow Waters"
Kayhan Ulgen
Post-Doctoral Fellow
Department of Estuarine and Ocean Sciences
School for Marine Science and Technology
Wednesday, September 28, 2022
12:30 pm to 1:30 pm
SMAST East Rooms 101/102
And Via Zoom
Abstract:
The effects of limited water depth on the hydrodynamic performance of a catamaran with the full-scale dimensions and geometry of a WAM-V 16 unmanned surface vehicle operating in shallow waters are investigated using an
incompressible URANS-VOF solver in OpenFOAM®. Numerical simulations of the flow associated with the passage of the catamaran in shallow waters have been conducted for a range of vehicle speed and several shallow to intermediate
water depths under free trim and sinkage conditions. The effects of water depth on the resistance and the dynamic motion of the catamaran are characterized. The total resistance coefficient of the catamaran is shown to increase by as much as
over 40% at trans-critical Froude numbers, close to the critical depth-dependent Froude number Fr = 1.0. The wave system associated with the flow is examined and its relationship to observed impacts on resistance, trim and sinkage are discussed. The effect of limited water depth on Kelvin's wake angle is characterized in terms of both length and depth Froude numbers and is shown to be in good agreement with theory.
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Join Zoom Meeting
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Meeting ID: 974 4006 9270
Passcode: 428029
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Meeting ID: 974 4006 9270
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Meeting ID: 974 4006 9270
Passcode: 428029
********************************************************************************
For additional information, please contact Sue Silva at s1silva@umassd.edu
Department of Estuarine and Ocean Sciences
Seminar Announcement
"Hydrodynamic Performance of a Catamaran in Shallow Waters"
Kayhan Ulgen
Post-Doctoral Fellow
Department of Estuarine and Ocean Sciences
School for Marine Science and Technology
Wednesday, September 28, 2022
12:30 pm to 1:30 pm
SMAST East Rooms 101/102
And Via Zoom
Abstract:
The effects of limited water depth on the hydrodynamic performance of a catamaran with the full-scale dimensions and geometry of a WAM-V 16 unmanned surface vehicle operating in shallow waters are investigated using an
incompressible URANS-VOF solver in OpenFOAM®. Numerical simulations of the flow associated with the passage of the catamaran in shallow waters have been conducted for a range of vehicle speed and several shallow to intermediate
water depths under free trim and sinkage conditions. The effects of water depth on the resistance and the dynamic motion of the catamaran are characterized. The total resistance coefficient of the catamaran is shown to increase by as much as
over 40% at trans-critical Froude numbers, close to the critical depth-dependent Froude number Fr = 1.0. The wave system associated with the flow is examined and its relationship to observed impacts on resistance, trim and sinkage are discussed. The effect of limited water depth on Kelvin's wake angle is characterized in terms of both length and depth Froude numbers and is shown to be in good agreement with theory.
********************************************************************************
Join Zoom Meeting
https://umassd.zoom.us/j/97440069270?pwd=L2Z1bDZESTFCKzJYZWduYVhWenYvZz09
Meeting ID: 974 4006 9270
Passcode: 428029
One tap mobile
+13017158592,,97440069270#,,,,*428029# US (Washington DC)
+13126266799,,97440069270#,,,,*428029# US (Chicago)
Dial by your location
+1 301 715 8592 US (Washington DC)
+1 312 626 6799 US (Chicago)
+1 646 876 9923 US (New York)
+1 253 215 8782 US (Tacoma)
+1 346 248 7799 US (Houston)
+1 669 900 6833 US (San Jose)
Meeting ID: 974 4006 9270
Passcode: 428029
Find your local number: https://umassd.zoom.us/u/adtxYu9NMO
Join by SIP
97440069270@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia Sydney)
103.122.167.55 (Australia Melbourne)
149.137.40.110 (Singapore)
64.211.144.160 (Brazil)
149.137.68.253 (Mexico)
69.174.57.160 (Canada Toronto)
65.39.152.160 (Canada Vancouver)
207.226.132.110 (Japan Tokyo)
149.137.24.110 (Japan Osaka)
Meeting ID: 974 4006 9270
Passcode: 428029
********************************************************************************
For additional information, please contact Sue Silva at s1silva@umassd.edu
Contact: > See Description for contact information
Topical Areas: School for Marine Sciences and Technology, SMAST Seminar Series