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!
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MTFLOW 1.23 MD 23 Sep 05
- Improved iteration handling of lowest streamline wherever it lies on the axis.
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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
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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 ).
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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
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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
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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.
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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.
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MTFLOW 2.03 MD 13 Jan 11
- Added delta** to BL listing and file dump of "B" command
- Fixed "E" command (elliptic grid smoother)
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MTFLOW 2.04 MD 19 Mar 11
- Added stagnation-streamline smoothing to the "E" command
- Made ISMOM=3 the default s-momentum flag