REFINE: Extend a Flow Solution to a Finer Grid

REFINE takes data files defining a fluid flow solution computed by FLOW6 and computes a coefficient file that corresponds to a finer grid. This allows a solution computed on a coarse grid to be compared with one computed on a fine grid.

Files you may copy include:

• refine.f90, the source code;
• elements.txt, the element data file>;
• uvp.txt, the node data file;
• g.txt, the coefficient file;
• g2.txt, the extended coefficient file;

The list of routines includes:

• REFINE extends a computed flow solution to a refined grid.
• COEF_EXTEND extends a vector of solution coefficients to a refined grid.
• COEF_READ reads the coefficient data from a file.
• COEF_WRITE writes the coefficient data to a file for possible restart.
• ELEMENT_READ reads an element file.
• GET_UNIT returns a free FORTRAN unit number.
• INDX_SET determines indices and other data from the NODE array.
• IVEC_PERMUTE permutes an integer vector in place.
• NODE_READ reads a file containing information about data at nodes.
• NODE_WRITE writes solution information to a file.
• REF_BF_L3 evaluates a reference element linear basis function.
• REF_BF_Q6 evaluates shape functions for a 6 node triangle.
• REF_MAP_Q6 returns the interpolation map for data on a 6 node triangle.
• RVEC_PERMUTE permutes a real vector in place.
• UVP_VALUE evaluates U, V and P at any point in a given element.
• X_OF_XSI computes X and Y given XSI and ETA coordinates.
• XYVEC_SORT_HEAP_INDEX does an indexed heap sort of (X,Y) data.

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