Spills Containment added significantly to development
ometry. Next,the grid files are imported into FLUENT where boundary condi
problem are specified.
costs. Now,CFD simulation is used in stead. This alternative allows research
tions and other information about the
through comparisons to channel testing and researchers can now quickly evaluate the performance of new oil boom designs. To test a new design, engineers modify the boom geom etry with GeoMesh, regenerate the grid, import the new grid into FLU ENT, and run a new analysis. One of the recently studied de signs, called a net-boom structure,
ers to simulate many design alterna tives quickly and inexpensively. Re cently, researchers have also begun
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to animate CFD results to enhance
their understanding of boom failure mechanisms.
When oil is accidentally spilled on water,the most common response is to use barriers or "booms" to col
lect the oil. As with any new prod uct, part of designing a new boom involves evaluating its performance under typical operating conditions. Oil boom testing is normally done in a tank, or channel, that is at least
30 metres long, by 15 metres wide, by two metres deep. What makes this type of testing expensive is the cost of the power needed to acceler ate that volume of water through the
This model has been validated
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consists of a solid boom with front
and bottom porous nets. The bot
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channel.
Researchers have turned to CFD
analysis as a less expensive way of predicting boom performance. The first step in preparing a water chan nel simulation is the creation of a
grid to conform to the problem ge
A series of simulated water-oil flows around a
flat boom with velocity 0.24m/s at sequential time moments from 60 seconds after the spiil. From these pictures, one can see the entire process of the oil loss underneath the boom.
tom net is horizontal. The front net
can be vertical or positioned at an angle in relation to the boom. Be cause it is so easy to evaluate differ ent design alternatives, researchers looked at numerous positions for the front net,including 0,30,49, and 67 degrees as measured from vertical. To adapt the analysis model to the new design with nets,engineers only needed to add porous regions(to rep resent the nets) as an additional mo mentum sink in the governing mo mentum equations. For more information,
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