22nd June 2011
Transocean releases investigation report for Deepwater Horizon
Transocean has released it's
into the loss of the Deepwater Horizon.
The CFD investigation into the gas dispersion following the loss of control of
the Macondo well, which is documented in
of the report, was led by Steve Howell of Abercus on behalf of
Prospect Flow Solutions.
A number of Abercus' software technologies were employed during the course of
the CFD studies:
was used to handle the drawings received from Transocean and create a reference
geometry database for use in the subsequent CFD gas dispersion analysis.
provided the required functionality for dividing this reference geometry into
primary geometry, which was taken forward to the unstructured CFD mesher, and the
secondary geometry, which was compiled into a separate congestion database.
was used to organise the complex CFD model set-up. There were many
separate internal areas that needed to be included within the CFD model,
complete with a detailed capture of the interconnecting ventilation ductwork,
and in some areas there were several revisions of geometry as more information
became available during the course of the investigation. The deployment of
JET managed this whole process effectively, allowing multiple users to
simultaneously work on the CFD model in different areas of the rig.
Sub-models were subsequently compiled into the complete model for the
entire vessel, which was embedded within a larger external domain aligned
with the wind direction of interest for the CFD simulations.
This whole process was handled automatically by JET.
The ACE method
was used to import the congestion database compiled by GeomAuditry and automatically allocate
the associated congestion resistances throughout the CFD model (which included both
unstructured and structured orthogonal meshes in different parts of the model).