TY - GEN
T1 - Flow Depths, Velocities Around Non-uniform Size Roughness Elements in Supercritical Flows
T2 - 3rd International Conference on River Corridor Research and Management, RCRM 2023
AU - Thappeta, Suresh Kumar
AU - Chandra, Venu
AU - Bhallamudi, Sreenivasa Murty
AU - Fiener, Peter
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.
PY - 2024/1/1
Y1 - 2024/1/1
N2 - Effects of randomly spaced, non-uniformly sized roughness elements on the flow structure and energy loss in a supercritical open-channel flow were investigated using numerical models and compared with experimental data. A three-dimensional numerical model for complex flow simulations was evaluated using experimental data. Simulations were performed at large Froude numbers varying from 2.5 to 2.8. The overall nature of the water surface profile was well simulated but a maximum of 30% error in water level was noticed closer to the roughness elements. The simulated velocity profiles matched well with the observed data in the upstream locations of roughness elements but a minor discrepancy was observed in the wake region (downstream side) near to bed. The numerical model did not accurately resolve the local flow features such as the heights and lengths of water jumps over obstacles. The maximum difference between the observed and predicted jump lengths was 73.4%. However, it satisfactorily simulated the general flow features, including the total energy loss.
AB - Effects of randomly spaced, non-uniformly sized roughness elements on the flow structure and energy loss in a supercritical open-channel flow were investigated using numerical models and compared with experimental data. A three-dimensional numerical model for complex flow simulations was evaluated using experimental data. Simulations were performed at large Froude numbers varying from 2.5 to 2.8. The overall nature of the water surface profile was well simulated but a maximum of 30% error in water level was noticed closer to the roughness elements. The simulated velocity profiles matched well with the observed data in the upstream locations of roughness elements but a minor discrepancy was observed in the wake region (downstream side) near to bed. The numerical model did not accurately resolve the local flow features such as the heights and lengths of water jumps over obstacles. The maximum difference between the observed and predicted jump lengths was 73.4%. However, it satisfactorily simulated the general flow features, including the total energy loss.
KW - Computational fluid dynamic model
KW - Local water depth
KW - Non-uniform size boulders
KW - Supercritical flow
UR - http://www.scopus.com/inward/record.url?scp=85192197214&partnerID=8YFLogxK
U2 - 10.1007/978-981-97-1227-4_21
DO - 10.1007/978-981-97-1227-4_21
M3 - Conference contribution
AN - SCOPUS:85192197214
SN - 9789819712267
T3 - Lecture Notes in Civil Engineering
SP - 285
EP - 300
BT - Advances in River Corridor Research and Applications - Select Proceedings of RCRM 2023
A2 - Chembolu, Vinay
A2 - Dutta, Subashisa
PB - Springer Science and Business Media Deutschland GmbH
Y2 - 15 June 2023 through 17 June 2023
ER -