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SUMMARY:Numerical models for dam-break flows at the intitial stage - Dr Do
 ngfang Liang\, Engineering\, Cambridge
DTSTART:20071108T113000Z
DTEND:20071108T123000Z
UID:TALK8690@talks.cam.ac.uk
CONTACT:Anne Alexander
DESCRIPTION:Abstract: Shallow water equations have been used widely to stu
 dy the dam-break wave propagations.  They are a set of hyperbolic equation
 s\, which admit discontinuities in the weak solutions.  The discontinuitie
 s correspond to the hydraulic jumps and bores.  However\, the basic assump
 tions behind the shallow water equations include smooth variance\, hydrost
 atic pressure distribution and zero vertical velocity components\, which a
 re apparently violated close to the discontinuities.  The smoothed particl
 e hydrodynamics model\, where the three-dimensional Navier-Stokes equation
 s with a free surface are solved\, has been used to quantify the inaccurac
 ies of the shallow water equations for predicting the initial-stage dam-br
 eak flows. 
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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