Chemical equilibrium composition and properties are calculated for assigned internal energies and assigned total reactant specific volumes or densities.   CEAgui also requires a final temperature estimate for the first point (default 3800K).   The program will calculate the internal energy of the total reactant from the Reactant dataset information and any reactant mixtures indicated from the Problem dataset.   The user has an option to override these values with ONE user-assigned internal energy value.

The program will try to converge with only the possible gaseous products and then checks on possible condensed products.    Sometimes the program cannot converge with gases alone because the temperature gets driven down to a very low value during the iteration procedure.   This may be remedied by adding one or two possible condensed products to the initial estimated composition with an Insert dataset.   This helps the program converge with both the gaseous and condensed products.

Note that the Problem and Reactant datasets must be completed before bringing up the Insert dataset screen.

Refer to example 4.

SPECIFIC VOLUME / DENSITY
User may assign either specific volume or density.   With either selection, there are two sets of units to choose from.   Density units are either g/cc or kg/m**3.   Specific volume is the inverse of density and thus the units are cc/g or m**3/kg.

The total reactant assigned internal energy value is divided by the universal gas constant R.    The u'/R units are (g-mol)K/(g of mixture).    See Eq.(2.38) in NASA RP-1311.

Use the ENTER, RETURN, or TAB key or click on the next empty cell after each table entry.

OPTIONS
The default estimated temperature 3800K may be changed.   The user has the option of overriding the CEAgui-calculated values of   u'/R for the total reactant with one user-assigned value.

HELP
The Help button displays the help menu for the Assigned Internal Energy and Specific Volume (uv) Problem.

SAVE
The Save button saves the data and returns to the Problem dataset.

RESET
The Reset button resets the data to the default settings.