Incorporating Exhaust Velocity

Topics about the HYSPLIT dispersion model.
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Incorporating Exhaust Velocity

Postby rotendd » February 14th, 2017, 9:11 pm

I am looking to model the CO2 emissions of large industrial complexes as accurately as possible. Is there a way to include the initial vertical velocity of the particles as they are exiting the stack? Most of the inputs that I have seen are for emission rate (mass/hr). Is there a way to include a velocity of meters/sec?

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Re: Incorporating Exhaust Velocity

Postby ariel.stein » February 15th, 2017, 10:25 am

We have incorporated an algorithm based on the Briggs equation (Briggs, 1969) for the buoyancy effects from a hot emission source. To set it up you will have to use a time varying emission file (EMITIMES; ... _emit.html).
Once you set up your run to use the EMITIMES file you will need to replace the HEAT release values with the ones for your particular stack. The model will start the lagrangian particles at the injection height calculated from the Briggs equation.

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