TY - JOUR

T1 - Side-by-side entrainment and displacement of cuboids due to a tsunami-like wave

AU - von Häfen, Hajo

AU - Stolle, Jacob

AU - Nistor, Ioan

AU - Goseberg, Nils

N1 - Funding Information: The authors would like to acknowledge the support of the NSERC CGS-D Scholarship (Jacob Stolle), of the NSERC Discovery Grant [No. 210282 ] (Ioan Nistor) and of the Marie Curie International Outgoing Fellowship within the 7th European Community Framework Program [No. 622214 ] (Nils Goseberg).

PY - 2021/3

Y1 - 2021/3

N2 - Large tsunamis pose an immense threat to the inhabitants and infrastructure of coastal communities. The hazard related to coastal flooding events depends not only on the hydrodynamic loading itself, but also on the amount of debris entrained and displaced by the flood. To date, limited knowledge on the interaction of tsunami-induced inundation and free-floating solid objects has been developed. Thus, it is unclear how these objects propagate within the flow and which parameters govern the entrainment and displacement process. The study presented herein attempts to improve the knowledge about the fundamental physical processes leading to objects entrainment and displacement. A unique set of flume experiments was designed and conducted at the Hydraulic Laboratory of the Department of Civil Engineering at the University of Ottawa, Canada. Shipping containers modelled as cuboids at the 1:40 geometric scale were entrained by a dam-break wave with different hydrodynamic conditions and initial configurations. For the first time, insight into the dependency of relevant parameters, such as cuboids gap-ratio and lateral displacement, is presented, with a focus on the cuboids rotation as well as longitudinal and lateral displacement. The cuboids movement is also related to the velocity field in the spatio-temporal domain. This study provides insights into the fundamental physical processes characterizing the displacement of cuboids and links these processes with their initial position. The data presented also serves as a benchmark dataset, which will be useful in the future for numerical modelling efforts.

AB - Large tsunamis pose an immense threat to the inhabitants and infrastructure of coastal communities. The hazard related to coastal flooding events depends not only on the hydrodynamic loading itself, but also on the amount of debris entrained and displaced by the flood. To date, limited knowledge on the interaction of tsunami-induced inundation and free-floating solid objects has been developed. Thus, it is unclear how these objects propagate within the flow and which parameters govern the entrainment and displacement process. The study presented herein attempts to improve the knowledge about the fundamental physical processes leading to objects entrainment and displacement. A unique set of flume experiments was designed and conducted at the Hydraulic Laboratory of the Department of Civil Engineering at the University of Ottawa, Canada. Shipping containers modelled as cuboids at the 1:40 geometric scale were entrained by a dam-break wave with different hydrodynamic conditions and initial configurations. For the first time, insight into the dependency of relevant parameters, such as cuboids gap-ratio and lateral displacement, is presented, with a focus on the cuboids rotation as well as longitudinal and lateral displacement. The cuboids movement is also related to the velocity field in the spatio-temporal domain. This study provides insights into the fundamental physical processes characterizing the displacement of cuboids and links these processes with their initial position. The data presented also serves as a benchmark dataset, which will be useful in the future for numerical modelling efforts.

KW - Debris wave interaction

KW - Flow around cuboids

KW - Long period waves

KW - Movable objects

KW - Objects displacement

KW - Tsunami

UR - http://www.scopus.com/inward/record.url?scp=85097332379&partnerID=8YFLogxK

U2 - 10.1016/j.coastaleng.2020.103819

DO - 10.1016/j.coastaleng.2020.103819

M3 - Article

AN - SCOPUS:85097332379

VL - 164

JO - Coastal Engineering

JF - Coastal Engineering

SN - 0378-3839

M1 - 103819

ER -