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   Flow Solvers Distributed with Cart3D

What flow Solvers are distributed with Cart3D?
What version of Tiger is being distributed?
Tell me a little about FlowCart?




What flow Solvers are distributed with Cart3D?
Cart3D is was developed with 2 flow solvers, Tiger and flowCart. Tiger is familiar to most longtime Cart3D users and was our baseline Euler solver up till Cart3D v1.2, documentation on it is available in the v.1.2 webdocs here. Starting with Cart3D v1.3 however, we're dropping it from the distribution, and it will be available only through special request
(e-mail me, i'll be happy to send any current user a tarball).  Its still and excellent code, but after 4 years of very active development, flowCart is now faster, more accurate, and more robust by virtually any measure. Moreover its more closely integrated into the rest of the package. flowCart is a domain-decomposition, multilevel solver and is aimed at distributed, parallel computing platforms. If you are a current Tiger user, we're encouraging you to start switching to flowCart,  

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What version of Tiger is being distributed?
Tiger14 was the last distributed version. It was included with Cart3D v1.2, but is no longer included in the distribution starting with Cart3D v1.3. If you want a copy contact me.
Tiger is  a uni-processor code that runs well on scalar and vector machines. It uses central-difference, finite-volume solver with blended second and fourth order dissipation. 

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Tell me a little about FlowCart?
flowCart is the current solver being released with Cart3D. It is a scalable, multilevel,  linearly-exact upwind solver and uses domain-decomposition to achieve very good scalability. It is among the most scalable, accurate and robust codes in the industry. On most modern desktop machines it can converge about 1 million cells-per-hour-per processor. flowCart is very tightly integrated into Cart3D and all of our  automation tools are built around it. Since it is a multilevel code, it converges substantially faster than Tiger and includes our latest work on low-dissipation approaches to solid wall boundaries, mesh interfaces and limiters. Both the parallelization and multigrid are completely transparent to the user and are turned on by simple command line arguments to encourage their use.   
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last update June 2004 M. Aftosmis