

	SINDA/FLUINT

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	Brief History
	Advance Design
	Two Phase Flow
	Comparisons
	System Reqts
	Release Notes
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	SinapsPlus

	Thermal Desktop

	RadCAD

	FloCAD

	Utilities

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RELEASE NOTES: SINDA/FLUINT Version 5.1

The major differences between Version 5.0 and Version 5.1 are summarized herein. Previous models are accepted with little difference in execution.

Variable Molecular Weight Fluid Species—6000 series FPROP DATA blocks now support an optional feature: a molecular weight that varies as a function of pressure and temperature. This option facilitates the modeling of complex mixtures, perhaps internally reacting or dissociating/recombining, such as ionized gases and hot products of combustion. It may be used alone or in combination with the chemical reactions described next.

Chemical Reactions—The ability to model finite rate (“reacting flow”) chemical reactions has been added. This capability takes in the form of species mass sink/source terms for FLUINT tanks within transients (or within STDSTL, but not FASTIC). The corresponding heat of reaction is applied on the basis of heat of formation added to the species fluid description (FPROP DATA block). A reaction rate utility routine (EQRATE) is available to help define chemical equations, and perhaps to drive the reaction to a desired state (as defined by either equilibrium fractions, or by reaction/ combustion efficiencies). One of the product species might be a variable molecular weight fluid, eliminating the need to track many products of combustion by using a single equivalent species instead.

MISCELLANEOUS IMPROVEMENTS

A new routine is available (TANKTRHO) to change tank (and only tank) temperatures instantaneously, holding density constant. It may also be used to specify density (and therefore mass), perhaps as an initial condition holding temperature constant (or alternatively, specifying a new temperature at the same time).
New PUMP options exist for ISTP: ‘TS’ and ‘ST’ to match the options available in TABULAR, TURBINE, COMPRESS, etc.
The output routines TURBMAP and COMPRMAP now print the unitless modifying factors δ, θ, and ε if MREF=3 and NSPD=1.
GFR, the flow rate (corresponding to FR but in Gtable units) at the start of the last interval, is available as an output variable for TABULAR, PUMP, TURBINE, COMPRESS (but not COMPPD). GFR is also printed in the corresponding tabulation-style output routines for each device type.
Execution of large FLUINT models (either due to number of lumps or number of constituents) has been accelerated by improved handling of internal data. No changes to the user interface have been made: this change is internal.
A new variation of ABLATE has been created to handle rate-of-recession as an input.