Dear all, I would like plot a Thermal Frontal Parameter TFP = −∇|∇τ | · ∇τ ∇τ = 0. Can someone help me? Thanks a lot! Kelen -------------- next part -------------- An HTML attachment was scrubbed... URL: http://gradsusr.org/pipermail/gradsusr/attachments/20161024/d70567c7/attachment.html