Journal of the Persian Gulf (Marine Science)
نشریه علمی پژوهشی خلیج فارس
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gregorian
2012
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ISPH Numerical Modeling of Nonlinear Wave Run-up on Steep Slopes
مهندسی فناوریهای دریایی
Marine Technology Engineering
بنیادی
Basic and Original Research
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Non-breaking tsunami waves run-up on steep slopes can cause severe damages to coastal structures. The
estimation of the wave run-up rate caused by tsunami waves are important to understand the performance
and safety issues of the breakwater in practice. In this paper, an Incompressible Smoothed Particle
Hydrodynamics method (ISPH) method was utilized for the 2DV numerical modeling of nonlinear wave
run-up on steep slopes. SPH is a meshless method based on particles, which is capable of high accurate
modeling of free surface flows with large deformations. In developed model, mass and momentum
conservation equations were solved in a Lagrangian form using a two-step fractional method. In the first
step, Navier-Stokes equations were solved to compute velocity components by omitting pressure term
and in the absence of incompressible condition. In the second step, the continuity constraint was satisfied
and the resulting Poisson equation was solved to calculate pressure terms. Velocity values were then
corrected and surface positions were computed. In the present model, a new technique was applied to
allocate density to the particles for the calculations. By employing this technique, ISPH model was
stablized. The developed ISPH model was first validated by the solitary wave propagation on the
constant water depth and the corresponding results showed good agreement with analytical results. The
convergence of the method and the sensitivity of relevant model parameters were discussed. Then,
validated model was used to study the run-up of solitary waves on steep slopes by considering a coastal
breakwater for various wall steepnesses (i.e. 1:1, 2:1, 4:1, 8:1 and vertical wall).
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ISPH, Fractional step method, Nonlinear wave, Solitary wave, Steep slopes, Run-up
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http://jpg.inio.ac.ir/browse.php?a_code=A-10-1-67&slc_lang=en&sid=1
Rasoul
Memarzadeh
rasoul.memarzadeh@eng.uk.ac.ir
`1003194753284600326`

1003194753284600326
Yes
Shahid Bahonar University of Kerman
Kourosh
Hejazi
`1003194753284600327`

1003194753284600327
No
K.N.Toosi University of Technology