v8.6.6

What's New:

• Added Mach number calculation and reporting for gas flow in pipes
• Added slurry viscosity correction for PFR and Pipe Segment (Yoshida et al, https://www.aidic.it/cet/13/32/349.pdf)
• New Modified Bubble-Point solver for Rigorous Columns
• Kinetic/HetCat/Conversion reactions/reactors now support compounds in solid phase
• Surface Tension is now calculated for all liquid phases
• General fixes to Rigorous Column model and solvers
• Fixed issue with Coolprop Incompressibles PP
• Fixed issues with Pump model
• Fixed Solid Cp calculation
• Other minor fixes and enhancements

Full Changelog: v8.6.5...v8.6.6