AeroHydro, Inc.

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CFD - Computational Fluid Dynamics

Since 1993, AeroHydro has provided geometry support for the WAMIT Joint Industry Project at M.I.T.'s Computational Hydrodynamics Facility, and has supplied advanced modeling and panelization capabilities to WAMIT/TIMIT users around the world. Our WAMIT package includes:
MultiSurf  (current release 4.8)
Capability for batch / command file operation
PAT2GDF utility -- converts .PAT files to .GDF and .FDF format
Interactive tutorial on WAMIT panelization

The extensive WAMIT tutorial addresses the following topics:

  • Contents of .GDF and .PAT files
  • Making GDF files from MultiSurf models
  • Control of panel inside/outside orientation
  • Control of panel counts
  • Matching of panel edges across patch boundaries
  • Avoidance of multiple coverage
  • Control of panel size distribution, e.g. cosine spacing
  • Use of SubSurfs in panelization
  • Systematic panelization series for convergence studies
  • Batch operation of MSURF and PAT2GDF
  • Making free-surface panels for second-order WAMIT
  • 8 examples models of ships and offshore structures

This complete WAMIT package is available now for immediate shipment to you. We believe it has great potential for systematizing and streamlining preparation of input files for your WAMIT applications. Educational and site-license discounts and training are available.

Licensed MultiSurf/WAMIT installations include:

 
M.I.T. Ocean Engineering Dept.
Chevron Corp.               
Mobil Oil Corp.
Aker Engineering
Texas A&M University
MacKnight Pty. Ltd.
Exmar Offshore Co.
Shell Oil Company
 Norsk Hydro
Saga Petroleum
STATOIL
Marintek A/S
University of Strathclyde 
Bechtel Corp.
McDermott Technology Inc.
Army Corps of Engineers

The thrust of development in the WAMIT project at M.I.T. is now on high-order panel methods -- HIPAN and HITIM -- which use B-spline geometry and singularity distributions, and require quite different geometric input from WAMIT. AeroHydro intends to support modeling capabilities for these new programs. A prototype utility NBS2HIP already forged a connection between the early versions of MultiSurf and HIPAN 2.0. New capabilities pertinent to HIPAN modeling were included in MultiSurf release 3.1. Interesting possibilities for automatic conversion from WAMIT to HIPAN models emerged at the last J.I.P. technical meeting and are being explored.