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| − | Known to work with:<BR>
| + | This project has migrated over to '''github'''. |
| − | {{VersionInfo}}{{Version1.6-ext}}{{Version1.7.0}}{{Version1.7.1}}{{Version1.7.x}}
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| − | <BR>
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| − | May also work with the latest version. Be the first to find out, and let me know.
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| − | <br>
| + | |
| − | <small>Subpage contents (alphabetical)<BR>
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| − | > [[Contrib_equationReader/functions|Functions]]<BR>
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| − | > [[Contrib_equationReader/Installation|Installation]]<BR>
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| − | > [[Contrib_equationReader/Programming|Programming]]<BR>
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| − | > [[Contrib_equationReader/Uninstallation|Uninstallation]]<BR>
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| − | > [[Contrib_equationReader/Using_equationReader|Using equationReader]]<BR></small>
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| − | <BR>
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| | | | |
| − | == What is it? ==
| + | '''''[http://github.com/Marupio/equationReader/wiki Click here for the new website.]''''' |
| − | '''equationReader''' is an extension to [[OpenFOAM]] that allows you to work with user-entered equations. For example: | + | |
| | | | |
| − | U.x "sin(pi_ * t / 4)";
| + | http://github.com/Marupio/equationReader/wiki |
| − | U.y "rho * nut / L";
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| − | U.z 0;
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| − | nu nu [0 2 -1 0 0 0 0] "1.2 + 3 * alpha^sin(pi_/6)";
| + | |
| − | aScalar "nu / max(5, alpha)";
| + | |
| − | alpha 1.3;
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| − |
| + | |
| − | == Features ==
| + | |
| − | * '''Works with most fields''' - Now works with ''single elements'', ''fields'', and ''GeometricFields'';
| + | |
| − | * '''Works with most Types''' - Now works with ''scalars'', ''vectors'', and all kinds of ''tensors'';
| + | |
| − | * '''Flexible data sources''' - In addition to these types, equations can also lookup values from ''dictionaries'', and you can create an ''activeVariable'' that derives its value on-the-fly.
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| − | * '''Order of operations''' - it is fully compliant with the conventional order of operations to an arbitrary parenthesis depth;
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| − | * '''Equation dependency tracking''' - equations can depend on one another to an arbitrary hierarchy depth;
| + | |
| − | * '''Circular-reference detection''' - it will halt computations when a circular reference is detected;
| + | |
| − | * '''On-the-fly equation mapping''' - it will automatically perform substitution on other equations when they are needed, even if they aren't specifically called for in the solver; and
| + | |
| − | * '''Dimension-checking''' - fully utilizes [[OpenFOAM]]'s built-in dimension-checking, or you can force the outcome to a specific dimension-set to quickly disable it (if you are lazy).
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| − | | + | |
| − | '''Limitations:''' Although '''equationReader''' works with all Types, at its core, it is just a ''scalar'' calculator with ''dimensions''. Therefore, you can't use vector operators, let alone tensor operators. Each equation must be expressed in scalar components.
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| − | | + | |
| − | == Why would you need this? ==
| + | |
| − | Let the user define their own equations - this makes your application '''more user-friendly''', and '''more flexible'''. But don't reinvent the wheel - if you are only working with ''boundary conditions'' or ''initial conditions'', Bernhard's [[Contrib/swak4Foam|swak4Foam]] would probably be more suitable.
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| − | | + | |
| − | == Learn more ==
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| − | | + | |
| − | * ''I'm sold, let me install it!'' - Check out the [[Contrib_equationReader/Installation|installation sub-page]].
| + | |
| − | * ''I'm a user, how do I format my equations?'' - Check out the [[Contrib_equationReader/Using_equationReader|user's guide sub-page]].
| + | |
| − | * ''I'm a developer, how do I use '''equationReader'''?'' - Check out the [[Contrib_equationReader/Programming|programmer's guide sub-page]].
| + | |
| − | * ''I've had enough, how do I uninstall it?'' - Check out the [[Contrib_equationReader/Uninstallation|Uninstallation sub-page]].
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| − | | + | |
| − | == Update info ==
| + | |
| − | * ''2010-07-21'': Initial release
| + | |
| − | * ''2010-08-05'': Bug-fix - differentiated versions for OpenFOAM-1.5.x/1.5-dev and OpenFOAM-1.6.x+
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| − | * ''2010-08-12'': Major upgrade
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| − | ** Introducing <tt>IOEquationReader</tt> - EquationReader is now an <tt>IOobject<tt>. This enables automatic output
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| − | ** Added support for <tt>scalarList</tt> data sources - including <tt>scalarField<tt>, <tt>volScalarField</tt>, etc.
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| − | ** Removed the need for pointers for data sources
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| − | ** Cleaned up available functions
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| − | * ''2010-10-16'': Bug fixes and added full support for fields
| + | |
| − | * ''2011-04-06'': Major upgrade
| + | |
| − | ** Efficiency improvement - pointer functions have been implemented to increase computation speed by an order of magnitude (at least).
| + | |
| − | ** Improved dimension-checking on all functions.
| + | |
| − | ** Added a fieldEvaluate function for active equations whose output is to a scalar field.
| + | |
| − | ** Bug fix to get it working with 1.6-ext and higher.
| + | |
| − | *''2011-09-13:'' Major upgrade
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| − | ** ''''Now a stand-alone library''''.
| + | |
| − | ** Now works with ''''vectors and tensors'''':
| + | |
| − | *** scalar;
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| − | *** vector;
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| − | *** tensor;
| + | |
| − | *** diagTensor;
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| − | *** symmTensor; and
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| − | *** sphericalTensor.
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| − | ** ''''Now works with GeometricFields'''
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| − | ** Dimension checking is now performed separately, improving efficiency of field and GeometricField calculations.
| + | |
| − | * Interface changes:
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| − | ** Add data functions reorganized / changed.
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| − | ** Evaluate functions reorganized / changed.
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| − | ** Update functions removed.
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| − | | + | |
| − | --[[User:Marupio|Marupio]] 22:15, 14 September 2011 (CEST)
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