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Main features of AULOS Version 3.2
At the international Hydroinformatics 2006 conference in Nice, France, Dr Barnett introduced the concept of modelling real hydraulic problems in three space dimensions and time by using what he called "3D Lattice solutions" to reduce problem complexity to a manageable level while still working with time-varying solutions in 3D space.
The heart of 3D Lattice solutions is the introduction of flow elements where warped surfaces rather than planes are used to describe the free water surface. Cross-sections may then have the conventional horizontal surface, but need not be parallel for exact mathematical description of the connecting free surface. This allows modelling of curved channels, among other things.
The complete analysis of real hydraulic problems in three space dimensions and time will be beyond the capacity of computers for the foreseeable future, but the combination of CELL Integral theory and 3D Lattice solutions within AULOS now offers users accurate, fast 3D modelling of practical problems.
The development of this facility in AULOS is an on-going theme of the releases in Hydra's Version 3 project. AULOS version 2.5 provided a capacity for multi-layered network connections at 3D nodes. Version 3.1 located cross-sections using horizontal map coordinates as well as a vertical datum. Version 3.2 uses these facilities to generate a highly efficient 3D matrix structure for very fast computational solutions, and completes the mapping of solutions to and from 3D space.
Typically, tens of years of prototype time can now be run in minutes of computing time without any compromise of solution accuracy.
The results lend themselves well to computer-generated animation, as has been recognized by Animation Research Ltd, a specialist company well-known for their work on yacht racing simulation in America’s Cup coverage. ARL now offer post-processing of AULOS results into flood animations customized to client requirements.
Click here to read the full article and review a list of the new features in AULOS version 3.2.
Click here to download three new programmes for AULOS or click on the software link to the left:
Terrain survey is increasingly based on aerial Lidar technology. While this is a great advance, secondary terrain data from other sources is still essential in all zones hidden from Lidar detection, including pipes, closed conduits, beds of open channels carrying permanent flow, and terrain changes through earthworks previous to or planned after the survey date. An advanced hydraulic modelling system must make provision to collate data from all these sources into a single coherent model representing the terrain at high enough resolution to differentiate adequately between streams, embankments and floodplains.
Click here to download a colour pdf copy (3210kB) of a full report prepared by Barnett & MacMurray Ltd.
Please note: You only have permission to download the above file if you accept the condition that the report is passed on as a whole and any content quoted is done so with the authors acknowledged.
A Hamilton-based consortium has won a $110,000 contract from Mighty River Power to forecast river flow responses to operations of their Waikato power generation control system. Dr Alastair Barnett announced that ... Click here to read more.
The
origins of our brand identities HYDRA and AULOS HydraulicsThe engineering discipline "hydraulics" comes from the Greek hudor "water" + aulos "pipe". Our main hydraulic design product "AULOS" (pronounced in English to rhyme with the names "PAUL" + "LOSS") derives from that origin. Our company name "HYDRA" links with hudor, but also pays tribute to Hercules, perhaps the prototype hydraulic engineer! Click here to read more...
Validation of Tsunami and Dambreak Hazard Models
A presentation on this subject was made to the modelling workshop of the New Zealand Water and Wastes Association in Auckland in September 2005. It proposes a simple standard quality assurance test for comparison of Dambreak solutions, using selected results from an extensive set of laboratory dambreak experiments conducted by the US Army Engineer Waterways Experimental Station in Vicksburg, Mississippi in 1959-60.
It should take under an hour to set up a model of the experimental layout fully described in the notes, and to compare the results with the provided experimental data.
* Click here to view an html version of
the presentation.
* Click here to download a
B&W pdf copy (746kb) of the presentation.
* Click here to download a
colour pdf copy (1350kb) of the presentation.
* Click here to download
an excel file of the test data (42kb)
Click here to read a report prepared for NZWWA / NZWERF by Opus International Consultants Ltd.
AULOS has been used in many different situations involving tsunamis. Click here to read about some of the tsunami situations AULOS has been used in.
A Swiss flood specialist group, Hunziker Zarn and Partner, has selected the New Zealand engineering software package AULOS as the base for a $100,000 investment in the future growth of their flood management consulting and software development business. Click here for more details
Please contact Bruce for more information by calling 0800 477 776 or emailing bruce@hrs.co.nz
AULOS is an advanced hydraulic modelling system with uses in urban drainage, flood management, and hydro-electric generation.
AULOS offers unique features which allow it to works with single seamless models of networks of open channels and pipes.
AULOS is accurate
AULOS models complex situations
AULOS solutions will save you money
AULOS models use conservation of energy requirements, as well as conservation of momentum and mass. This means that you can specify flow through open channels, pipes and even overland flow, all in one model, without artificial constructs such as non-existent manholes and without trying to combine several different models that cannot interact.
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