moving mesh

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Author Message   Mauro Chierici Lopes (chierici) New member Username: chierici Post Number: 1 Registered: 01-2006 Posted on Thursday, January 12, 2006 - 07:32 am:    Hi I'm studing 2D_position_blob problem. What means the r in the line VELOCITY(Xm) = -0.25*sin(t)*x/r? Thank you.   Jerry Brown (jerrybrown11743) Member Username: jerrybrown11743 Post Number: 17 Registered: 03-2004 Posted on Thursday, January 12, 2006 - 02:42 pm:    sqrt(x**2+y**2)   Robert G. Nelson (rgnelson) Moderator Username: rgnelson Post Number: 515 Registered: 06-2003 Posted on Thursday, January 12, 2006 - 03:55 pm:    Hmmm.... Somewhere along the line the documentation section "Predefined Elements" seems to have disappeared. I will have to put it back in. The FlexPDE problem descriptor language predefines the following elements: PI = 3.14159265.... R = sqrt(x^2+y^2) {in 2D geometry } R = sqrt(x^2+y^2+z^2) { in 3D geometry } THETA = arctan(y/x) STAGE = { number of the current STAGE } LAMBDA = { represents an eigenvalue }