MTFLOW 1.22 HHY 6/15/99 -BUGS found in a number of places, convergence criteria not properly used for BL's, delta not correct near axis, etc.... - Changes were made to the plot output to get separate BL, grid and data plots. - Changes to BL streamtube width to use correct width near axis. - Changes to force routines for body drag, proper theta calculation, etc. - Changes made to print forces and BL to file as option. Note that this version still does not properly implement a comprehensive convergence criteria. Be aware and run extra iterations and check forces for convergence! ------------------------------------------------------------ MTFLOW 1.23 MD 23 Sep 05 - Improved iteration handling of lowest streamline wherever it lies on the axis. ------------------------------------------------------------ MTFLOW 1.30 MD 20 Apr 06 - Fixed linearization bug of BI circumeferece array - Farfield source and doublet calculation now fully linearized - Improved delta* offset vector calculation and linearization - Newton clamping tests now performed on all variables which might cause a crash - Extended the convergence criteria - Added nhat plotting code, currently commented out in pagepl.f ------------------------------------------------------------ MTFLOW 1.32 MD 19 Sep 06 - Improved handling of laminar->turbulent changeover segment in BL equations - Eliminated spline problems which occurred if a point near the leading edge was just slightly above the axis ( e.g. y=0.00002 ). ------------------------------------------------------------ MTFLOW 1.33 MD 12 Mar 08 - Tweaked some limiters in the BL formulation, for better transient handling. - Added total momentum-area and KE-area defects to the Viscous plot menu ------------------------------------------------------------ MTFLOW 2.00 MD 20 Nov 09 - Major method reformulation - Parameter field are now defined only where nonzero sources are present - Total enthalpy and circulation are now state variables, not prescribed - Blade-angle/swirl model has been added to optionally represent blade loads - Blade camber surface geometry generation capability added ------------------------------------------------------------ MTFLOW 2.01 MD 5 Jun 10 - Modified the parameter-field point-location algorithm for more speed, by using 2D interval-halving of the field-parameter grid. Search time went from O( I x J x Ifield x Jfield ) to O( I x J x log(Ifield) x log(Jfield) ). One point-search and interpolation logic is also now used for all field parameters. Before each parameter was processed independently. ------------------------------------------------------------ MTFLOW 2.02 MD 8 Nov 10 - Added different Nhat (grid-move vector) options, selectable in the "M" menu in MTSOL: 0 Nhats fixed, only in y-direction 1 Nhats fixed, interpolated between surface-normal and y-direction 2 Nhats in normal direction, updated every Newton cycle - MTSOL now executes in one of two modes: Fast: 2 variables per cell (n, rho). 1 variable (n) if ISMOM=2. Restricted solver with assumed zero swirl and constant total enthalpy. Same formulation as MSES. Applies to external-aero cases. Slow: 4 variables per cell (n, rho, Gamma, ho) Full solver with nonzero swirl and total enthalpy from field-parameter sources. General solver used with actuator disks, etc. The mode is automatically chosen depending on whether or not swirl or heat addition field parameters are specified. ------------------------------------------------------------ MTFLOW 2.03 MD 13 Jan 11 - Added delta** to BL listing and file dump of "B" command - Fixed "E" command (elliptic grid smoother) ------------------------------------------------------------ MTFLOW 2.04 MD 19 Mar 11 - Added stagnation-streamline smoothing to the "E" command - Made ISMOM=3 the default s-momentum flag