Note: | This data is normally extracted from the MPIDMKSBIN, MPIDIPSBIN, MPIDFPHBIN or MPIDCGS material property databases via PATQ menu pick 4 or placed in the MATDAT file by the user. |
MPID (keyword) | MPID | IEVAL | ITSCAL | NODEZ | [LABEL] |
MPID 1234 T Fahrenheit 2.0D+00
Zinc Oxide Thermal Conductivity
Parameter | Description |
MPID | Material Property Identification Number (MPID) that is assigned to each material property. This MPID number will then be used to reference the material property in Network Construction, 276 as part of the thermal resistor and capacitor data. MPID numbers must be greater than 0 when defined in this section. |
IEVAL | Material property evaluation code that denotes whether the material property is to be evaluated as a constant, table, power series, Sutherland equation, Bingham equation, reciprocal relation, straight line, arbitrary order polynomial, phase change data set, or user-supplied subroutine. The allowed evaluations are listed below. Note that only the first character of the IEVAL string is typically significant, so T, Table, and Table_Data are equivalent. There are exceptions. For example the power series evaluation and the phase change data sets. For these two characters must be supplied (i.e., PO for power series or PH for phase change data sets). If the IEVAL character string contains blanks, it must be enclosed in single quotes. The MDATA1 and MDATA2 values are input constants that are specified in Material Property Data, 268. |
A - The material property is an arbitrary order polynomial of the following form (MDATA2 values are ignored): P(T) = MDATA1(1) + MDATA1(2) * T1 + MDATA1(3) * T2 + ... + MDATA1(N) * T(N-1) B - This property is the viscosity of fresh water at normal pressures, and the viscosity is to be calculated using the Bingham equation (see Ref. 4, p. 665). The units will be N-s/m2 if the calculations are performed in Celsius or Kelvin, and lbm/ft-s if the calculations are performed in Fahrenheit or Rankine. C - The material property is a constant. D - Description. Provides a way to pass text information through material properties to user routines DV - Dependent Variable material properties are used in conjunction with an independent variable material property. Particularly useful if several functions have the same independent variable significant. Not only does one have a savings in space but the evaluation for subsequent dependent values is faster. H - The data forms a tabular function that is to be interpolated using Hermite polynomials or extrapolated using a quadratic polynomial. The Hermite polynomial is a cubic, and is used only for interpolation. The Hermite polynomials insure that the function and the slope are continuous from interval to interval within the data table. Quadratic interpolation is used on the first and last interval of the table. At least three data pairs must be defined to use this option. See MDATA1/MDATA2 in Material Property Data, 268. ID - Independent variable provide the independent variable so that interpolation factors can be defined for a series of dependent variable routines that reference it. Two interpolation options are available, one is a linear table and the other is a logarithmic table. The data and operation of the table is the same as the indexed linear table. IH - The data forms an indexed tabular function that is to be interpolated using Hermite polynomials or extrapolated using a quadratic polynomial. The difference between the index hermite and the hermite interpolation is that the index hermite begins its search for valid table position based on the last exit from the table. This can yield significant time improvements. | |
L - The data forms a tabular function that is to be linearly interpolated or extrapolated. The temperature intervals of the table are equally spaced. The table is interpolated or extrapolated based on a Linear Computed Interval (LCI) algorithm. This is the fastest of QTRAN's table interpolation algorithms. A minimum of two property values must be defined to use this option. See MDATA1 in Material Property Data, 268. | |
M - The data is used to form a straight line of the following form: P(T) = MDATA1(1) * T + MDATA2(1) Optical Thermal - Radiation variables that can be translated for interfacing to external radiation codes. Used by the STEP TAS interface. PE - The data forms are indexed tabular functions which is linear interpolated. the independent variable is normalized by the period which is the difference between the maximum and minimum values specified for the independent variable. PH - The data will be evaluated as a phase change data set, with each MDATA1/MDATA2 data pair corresponding to a phase transition temperature (MDATA1), and a latent heat (MDATA2). PO - The data will be evaluated as a power series of the form: P(T) = MDATA1(1) * TMDATA2(1) + ... + MDATA1(N) * TMDATA2(N) | |
R - The data will be evaluated as a reciprocal function, i.e.: S - The data will be evaluated as a Sutherland equation. Sutherland equations are commonly used for liquid and gas material properties such as viscosities and thermal conductivities. A Sutherland equation is defined as follows: where: P[T] = property value at temperature T; P[o] = property value at reference temperature T[o]; and S = Sutherland constant for the particular material. For more information about Sutherland equations, see Ref. 4. in Appendix A, and also later in this section. T - Data forms a tabular function that is to be linearly interpolated or extrapolated. A minimum of two data pairs must be defined to use this option. See MDATA1/MDATA2 in Material Property Data, 268. IT - Data forms an indexed tabular function that is to be linearly interpolated or extrapolated. This is identical to the tabular function except the table is entered at the position that it was previously exited. | |
U - Data given for MDATA1(1) will be used to specify a specific user-supplied subroutine option. When a U is specified for IEVAL, QTRAN will call user-supplied subroutine UPROP to get a property value. The value given for MDATA1(1) may be used to select a specific suboption (e.g., a whole family of user-supplied algorithms may exist in subroutine UPROP and MDATA1(1) may be used as an algorithm option identifier). Notice: The scale factor for this evaluation option is read but not used. | |
ITSCAL | Temperature scale for which the tabular input data is valid (all other conversion routines ignore ITSCAL). QTRAN will automatically convert data tables from other temperature scales into the temperature scale defined for calculations (see ICCALC, (p. 230)). For example, if calculations are being performed in Kelvin (i.e., ICCALC = K in Temperature Scale and Time Units Definition, 230 but the material property data available is in Celsius, QTRAN will convert this table to Kelvin before use if ITSCAL is entered as C. Note that only the first character of the ITSCAL character string is significant, so “F” and “Fahrenheit” are equivalent. |
Table data may be converted to or from any of the following temperature scales: F--Fahrenheit C--Celsius K--Kelvin R--Rankine T--Time | |
If T (for time) is given for ITSCAL, no table conversions will occur. The “material property” is then evaluated as a time dependent function, regardless of the IEVAL option selected. | |
FACTOR | A scaling factor that is used to easily scale a material property’s values. The value entered for FACTOR is used to multiply the property data. If a number whose absolute value is less than 1.E-18 is entered for FACTOR, FACTOR will be assigned a value of 1.0. In addition to scaling for parameterization runs, FACTOR may also be used to change units systems conveniently. Notice: FACTOR applies to all material property evaluation options EXCEPT the BINGHAM fresh water viscosity equation and the user-supplied subroutine option. For these options, FACTOR is read but is not used. |
LABEL | One or more 80-character identification labels that will be read by the program and printed with the echoed input data. These labels identify material properties for your convenience, but the labels are not used by QTRAN. These labels allow short messages to be printed (e.g., NITROGEN VISCOSITY) with the material property data to facilitate documentation. As many lines of label data as desired may be entered (anything between the MPID line and the terminating / character that does not start with the keyword MDATA will be treated as a label). |
MDATA (keyword) | MDATA1 | MDATA2 |
MDATA 2.0 5.0
MPID 17 Arbitrary-Polynomial Celsius 1.0
Example Arbitrary Order Polynomial Definition
MDATA 1.0
MDATA 1.3
MDATA -0.3
/
MPID 23 Bingham Kelvin 1.0
Bingham Fresh Water Viscosity Equation
/
MPID 47 Constant Kelvin 1.0
Constant Material Property Definition
MDATA 1.2345
/
MPID 3 Table Fahrenheit 1.0
Example Linear Table Property Definition
MDATA 0.0 27.0
MDATA 100.0 29.4
MDATA 173.0 55.2
MDATA 2000.0 87.3
/
MPID 4 Hermite Fahrenheit 23.79E-03
Example Linear Table Property Definition
MDATA 0.0 27.0
MDATA 100.0 29.4
MDATA 173.0 55.2
/
Note: | At least two data pairs must be entered for the T option, and at least three data pairs for the H option. |
MPID 3 ITable Fahrenheit 1.0
Example Linear Table Property Definition
MDATA 0.0 27.0
MDATA 100.0 29.4
MDATA 173.0 55.2
MDATA 2000.0 87.3
/
MPID 4 IHermite Fahrenheit 23.79E-03
Example Linear Table Property Definition
MDATA 0.0 27.0
MDATA 100.0 29.4
MDATA 173.0 55.2
MDATA 2000.0 87.3
/
Note: | At least two data pairs must be entered for the IT option and at least three data pairs for the IH option. |
MDATA1(1) | Lowest temperature in the tabulated property data |
MDATA1(2) | Temperature interval assumed between all property entries |
MDATA1(3...N) | The table property values, beginning at the lowest temperature property value and proceeding to the highest temperature property value in the LCI table. At least two property values must be entered |
MDATA2 values are ignored and should be left blank |
MPID 7 LCI K 1.0
Example LCI table property.
MDATA 0.0 ; Base Temperature
MDATA 100.0 ; Temperature Increment
MDATA 23.7 ; Property Value at 0.0 K
MDATA 29.9 ; Property Value at 100.0 K
MDATA 25.3 ; Property Value at 200.0 K
MDATA 17.2 ; Property Value at 300.0 K
MDATA 0.7 ; Property Value at 400.0 K
MDATA 0.7 ; Property Value at 500.0 K
/
MPID 32 M K 1.0
Example Straight Line Material Property
MDATA 0.17 117.9
/
MPID 104621 PEriodic Time 1.4
MDATA 60.0 122.
MDATA 71.0 212.
MDATA 76.5 1400.
MDATA 92.0 220.
/
MPID 1023 PHase Change Data Kelvin 1.0
Example #1 Phase Change Data Set
MDATA 600.0 1024.9 ; T=600, H=1024.9
/
MPID 1 PH Rankine 1.1
Example #2 Phase Change Data Set
MDATA 763.94 1.97E+06 ; T1=763.94, H1=1.97E+06
MDATA 948.7 2.0E+05 ; T2=948.7, H2=2.00E+0541
/
MPID 49 Power Series Rankine 1.0
Example Power Series Material Property Definition
MDATA 1.2 -0.4
MDATA 7.3 0.1
MDATA 1.0E+01 2.0
/
MPID 10 'Reciprocal Function' Celsius 1.0
Example Reciprocal Function Material Property
MDATA 1.0 273.15
/
MDATA1(1) | P(0) | |
MDATA2(1) | T(0) | |
MDATA1(2) | S |
MPID 78 Sutherland Kelvin 1.1
Example Sutherland Equation Material Property
MDATA 0.7 8.9 ; P[o] and T[o].
MDATA 23.9 ; S.
/
MPID 88 U K 1.0
Example User-Supplied Subroutine Material Property
MDATA 2
/