Earth-prints repository, logo   DSpace

About DSpace Software
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library
Please use this identifier to cite or link to this item:

Authors: Folch, A.*
Costa, A.*
Hankin, R. K. S.*
Title: twodee-2 : A Shallow Layer Model for Dense Gas Dispersion on Complex Topography
Issue Date: 28-Nov-2007
Keywords: Dense gas transport
Fortran code
Gas hazard
Computational model
Abstract: twodee-2 is a Fortran 90 code based on a previous code (twodee). It is de- 8 signed to solve the shallow water equations for fluid depth, depth-averaged horizon- 9 tal velocities and depth-averaged fluid density. The shallow layer approach used by 10 twodee-2 is a compromise between the complexity of CFD models and the simpler 11 integral models. It can be used for forecasting gas dispersion near the ground and/or 12 for hazard assessment over complex terrains. The inputs to the model are topog- 13 raphy, terrain roughness, wind measurements from meteorological stations and gas 14 flow rate from the ground sources. Optionally the model can be coupled with the 15 output of a meteorological processor which generates a zero-divergence wind field 16 incorporating terrain effects. Model outputs are gas concentration, depth-averaged 17 velocity, averaged cloud thickness and dose. The model can be a useful tool for gas 18 hazard assessment by evaluating where and when lethal concentrations for humans 19 and animals can be reached.
Appears in Collections:Manuscripts
05.08.01. Environmental risk

Files in This Item:

File SizeFormatVisibility
FolCos-2007.pdf468.66 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Share this record




Stumble it!



Valid XHTML 1.0! ICT Support, development & maintenance are provided by CINECA. Powered on DSpace Software. CINECA