On the Generation of Tsunami in a Large Scale Wave Flume

Schimmels, Stefan; Sriram, V.; Didenkulova, Ira; Fernández, H.

doi:10.9753/icce.v34.currents.14

Cited by 8 publications

(8 citation statements)

References 17 publications

(30 reference statements)

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“…Similarly, Schimmels et al (2014Schimmels et al ( , 2016 found that the leading wave surface elevation corresponding to the 2004 Indian Ocean tsunami could also be reasonably well described through this methodology. The corresponding input coefficients for the description of these two signals are given in Table 3, where t 0 = 0 in all cases.…”

Section: Tsunani-scale Wave Boundary Layers: Measured Signalsmentioning

confidence: 99%

Numerical simulation of tsunami-scale wave boundary layers

Williams

Fuhrman

2016

Coastal Engineering

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This paper presents a numerical study of the boundary layer flow and properties induced by tsunami-scale waves. For this purpose, an existing onedimensional vertical (1DV) boundary layer model, based on the horizontal component of the incompressible Reynolds-averaged Navier-Stokes (RANS) equations, is newly extended to incorporate a transitional variant of the standard two-equation k-ω turbulence closure. The developed numerical model is successfully validated against recent experimental measurements involving transient solitary wave boundary layers as well as for oscillatory flows, collectively demonstrating the ability to reproduce accurate velocity profiles, turbulence, and bed shear stresses on both smooth and rough beds. The validated model is then employed for the study of transient wave boundary layers at full tsunami scales, covering a wide and realistic geophysical range in terms of the flow duration, bottom roughness, and associated Reynolds numbers. For this purpose, three different "synthetic" (idealised) tsunami wave descriptions are considered i.e. invoking: (1) single wave (solitary-like, but with independent period and wave height), (2) sinusoidal, and (3) N-wave descriptions. The flow, boundary layer thickness, turbulence, and bed shear stresses induced are systematically monitored and parameterised, under both hydraulically smooth and rough bed conditions. The results generally support a notion that the boundary layers induced by * Corresponding author Email addresses: i.a.williams@utwente.nl (Isaac A. Williams ), drf@mek.dtu.dk (David R. Fuhrman ) Preprint submitted to Coastal EngineeringDecember 28, 2015 tsunami-scale waves are both current-like, due to their long durations, but also wave-like in the sense that the boundary layer will not necessarily span the entirety of the water column. The results likewise suggest that there is a continuum connecting wind-wave and tsunami-wave scales, as existing expressions commonly used for characterising boundary layer properties beneath wind waves maintain reasonable accuracy when extrapolated to full tsunami scales. Boundary layers driven by actual field-measured tsunami signals are likewise simulated, stemming from both the 2004 Indian Ocean as well as the 2011 Tohoku events. These results are reconciled with the various synthetic tsunami signals considered, generally confirming their usefulness as idealised tsunami waves.

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Section: Tsunani-scale Wave Boundary Layers: Measured Signalsmentioning

confidence: 99%

Numerical simulation of tsunami-scale wave boundary layers

Williams

Fuhrman

2016

Coastal Engineering

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“…However, solitary and cnoidal-like waves are rarely observed during tsunami propagation. Furthermore, their characteristics are not comparable with most of real-field tsunamis as reported by (Madsen et al 2008;Goseberg et al 2013;Schimmels et al 2014). However, a set of solitary and cnoidal-like waves can be formed in the far field as a result of long wave transformation into an undular bore, as it was observed during 2004 tsunami in the Indian ocean near the coast of Thailand (Fig.…”

Section: Abstract: Long Wave Dynamics; Elongated Solitons; Propagatiomentioning

confidence: 84%

“…It has been demonstrated in (Schimmels et al 2014) that existing testing facilities with piston type wave makers (with a large stroke) can effectively be used to generate very long non-breaking waves. In this paper we will focus on the possibility to study all the three mentioned types of waves in these facilities.…”

Section: Abstract: Long Wave Dynamics; Elongated Solitons; Propagatiomentioning

confidence: 99%

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Long Wave Propagation, Shoaling and Run-Up in Nearshore Areas

Sriram¹,

Didenkulova

Schimmels

et al. 2014

Int. Conf. Coastal. Eng.

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“…Port and Airports Research Institute in Japan have a Large Hidro-Geo Flume at 184 m long, 3.5 m wide and 12 m deep (Allsop, et al, 2014). Germany has a large wave flume (Großer Wellenkanal, GWK) at Forschungszentrum Küste (FZK) in Hannover with total length of about 300 m, 5m wide and 7m deep, equipped with a piston type wave maker with 4 m stroke (Schimmels et al, 2014). A long flume is certainly capable of various simulation tasks, however; a short flume is a convenient option for particular for simulation.…”

Section: Introductionmentioning

confidence: 99%

Design of a Facility for Tsunami Run up Generation to Study Tsunami and Seawall Interaction

Warniyati

Triatmadja

Yuwono

et al. 2019

Journal of the Civil Engineering Forum

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Experimental researches on the tsunami in the laboratory have been conducted using various methods. The use and techniques of tsunami wave generator depend on the objective of the tsunami observation to be conducted. When the objective is the scouring at the downstream of a seawall, the use of a short flume with control discharge seems to be appropriate. A valve with a mechanic controller was equipped to control the discharge from a reservoir into the flume. A numerical simulation of discharge into the flume and the overflow above the seawall was conducted to determine the dimension of the tsunami flume and its generator before construction. The experiments were conducted to simulate the hydrograph of tsunami overflow above the seawall model. The numerical hydrograph is found to be comparable with the experimental hydrograph. This indicates that the tsunami wave generator is capable of simulating tsunami hydrograph and ready for further use of simulations.

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On the Generation of Tsunami in a Large Scale Wave Flume

Cited by 8 publications

References 17 publications

Numerical simulation of tsunami-scale wave boundary layers

Numerical simulation of tsunami-scale wave boundary layers

Long Wave Propagation, Shoaling and Run-Up in Nearshore Areas

Design of a Facility for Tsunami Run up Generation to Study Tsunami and Seawall Interaction

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