Subtask 1.6.2 High Resolution Coastal Modelling
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Subtask 1.6.2 High Resolution Coastal Modelling. APAT Italian Agency for Environmental Protection. Francesco Lalli Luca Liberti. The Continuous Depth-Averaged Model * * * Turbulence Modeling:  =  0 +  t  t = C H u  Fischer (1973), Nezu (1996). The Discrete Model

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Francesco Lalli Luca Liberti

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Subtask 1.6.2 High Resolution Coastal Modelling

APAT

Italian Agency for Environmental Protection

Francesco Lalli

Luca Liberti


The Continuous Depth-Averaged Model

*

*

*

Turbulence Modeling:  = 0 + t

t = C H uFischer (1973), Nezu (1996)


  • The Discrete Model

  • § Primitive Equations

  • §    Finite Difference (Le and Moin, 1991)

  • Þ        staggered grid

  • Þ          time marching: 3rd order Runge-Kutta

  • Þ          spatial derivatives: explicit 2nd order centered schemes

  • convective terms: SMART scheme (Gaskell & Lau, 1988)

  • §  Complex Geometries: boundary body forces approach (Fadlun et al, 2000)


SIMPLE-SHAPED CHANNEL HARBOUR


SIMPLE SHAPED CHANNEL HARBOUR:

TIME-AVERAGED NUMERICAL SOLUTION


Pescara Harbor (Adriatic Sea, Italy)

BREAKWATER

JETTY

MARINA

PESCARA RIVER


BREAKWATER ENVIRONMENTAL EFFECTS

Temperature Field


Velocity field (river discharge 30 m3/sec)


BAROTROPIC JET: PESCARA HARBOUR MODEL (horizontal scale 1:1000, vertical scale 1:100)


BAROCLINIC JET: PESCARA HARBOUR MODEL

(horizontal scale 1:1000, vertical scale 1:100)


Wave-submerged barrier interaction


Wave-submerged barrier interaction: rip current generation (wave elevation)


Wave-submerged barrier interaction: rip current generation (velocity vectors)


Wave-submerged barrier interaction: rip current generation (vorticity)


Neretva River Mouth: Bathimetry


Neretva river mouth.Grid resolution: 12x12 m


Mala Neretva river mouth.Grid resolution: 12x12 m


Snapshot of the flow field: velocity vectors. Mala Neretva flow rate=72 m3/sec Neretva flow rate=156 m3/sec


Snapshot of the flow field: vorticity


Diffusion of river waters


Flow in a simple-shaped channel harbor

Numerical Solution

Re = UL/ = 100

Numerical Solution

Re = UL/ = 300


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