- The no-slip condition at the particle surface is satisfied exactly.
- The lower-order underdetermined coefficients give the force, torque, and stresslet on the sphere directly, thus avoiding the need to integrate the calculated fluid stress over the particle surface.
- If the Stokes approximation is used beyond its approximate domain of validity, the iterative process will not converge. In this sense, the method contains a built-in accuracy test.

The current solver has been implemented using a locally refined mesh for the spheres in the PHYSALIS method.

**Date:**- April 2008 - March 2009

**Version:**- 1.0

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