methane.fld

一个关于物性计算的软件

#TCX               !thermal conductivity model specification
TC1  pure fluid thermal conductivity model of Friend et al. (1989).
?LITERATURE REFERENCE \
?Friend, D.G., Ely, J.F., and Ingham, H.,
? "Tables for the Thermophysical Properties of Methane,"
? NIST Technical Note 1325, 1989.
?\
?The uncertainty in thermal conductivity of the dilute gas between 130
?and 625 K is 2.5%.  For temperatures below 130 K, the uncertainty is
?less than 10%.  Excluding the dilute gas, the uncertainty is 2% between
?110 and 725 K at pressures up to 70 MPa, except near the critical
?point which has an uncertainty of 5% or greater.  For the vapor at lower
?temperatures and the dense liquid near the triple point, an uncertainty of
?10% is possible.
?\
!end of info section
90.6941            !lower temperature limit [K]
625.0              !upper temperature limit [K]
1000000.0          !upper pressure limit [kPa]
40.072             !maximum density [mol/L]
3   0              !# terms for dilute gas function:  numerator, denominator
174.    1.0d-3     !reducing parameters for T, tcx
 1.45885                 0.0           !coeff, power in T
-0.4377162              -1.0
 0.                    -96.0           !coeff, power in T
8   0              !# terms for background gas function:  numerator, denominator
190.551   10.139    6.29638d-3  !reducing parameters for T, rho, tcx
 1.5554612    0.0    2.0   0.0  !coeff, powers of t, rho, exp(rho)
 1.           0.0    0.0 -99.0  !The order here is important
 2.4149207    0.0    1.0   0.0
 0.55166331   0.0    3.0   0.0
-0.52837734   0.0    4.0   0.0
 0.073809553 -1.0    4.0   0.0
 0.24465507   0.0    5.0   0.0
-0.047613626 -1.0    5.0   0.0
CH4                !pointer to critical enhancement auxiliary function


#ETA               !viscosity model specification
VS2  pure fluid viscosity model of Younglove and Ely (1987).
?LITERATURE REFERENCE \
?Younglove, B.A. and Ely, J.F.,
? "Thermophysical properties of fluids. II. Methane, ethane, propane,
? isobutane and normal butane,"
? J. Phys. Chem. Ref. Data, 16:577-798, 1987.
?\
?N.B.  all temperatures on IPTS-68
?\
?The uncertainty in viscosity is 2%, except in the critical region which is 5%.
?\
!end of info section
90.6941            !lower temperature limit [K]
625.0              !upper temperature limit [K]
1000000.0          !upper pressure limit [kPa]
40.072             !maximum density [mol/L]
CI2                !pointer to collision integral model
0.368              !Lennard-Jones coefficient sigma [nm]
168.0              !Lennard-Jones coefficient epsilon/kappa [K]
0.1069188          !const in Eq 19 = 5/16*(k*MW/1000/pi/Na)**0.5*1.0d12
 0.5               !exponent in Eq 19 for T
  0.16969859271d+0 !coeff for initial density dependence of viscosity (eq 21); Fv(1)
 -0.13337234608d-1 !Fv(2)
  0.140d+1         !Fv(3)
  0.168d+3         !Fv(4)
 -0.1620427429d+2  !coefficients for residual viscosity, eqs (22 - 25)
  0.4270589027d+3  !Ev(2)
  0.1402596278d+2  !Ev(3)
 -0.3916837745d+4  !Ev(4)
 -0.3477099090d-1  !Ev(5)
  0.2136542674d+2  !Ev(6)
  0.1436802482d+4  !Ev(7)
  10.15            !Ev(8)
NUL                !pointer to critical enhancement auxiliary function (none used)


@ETA               !viscosity model specification
VS1  pure fluid viscosity model of Friend et al. (1989).
?LITERATURE REFERENCE \
?Friend, D.G., Ely, J.F., and Ingham, H.,
? "Tables for the Thermophysical Properties of Methane,"
? NIST Technical Note 1325, 1989.
?\
?The uncertainty in viscosity is 0.5% between 270 and 600 K, and 1% above
?600 K.  Below 270 K, the uncertainty is 2%.
?\
!end of info section
90.6941            !lower temperature limit [K]
625.0              !upper temperature limit [K]
1000000.0          !upper pressure limit [kPa]
40.072             !maximum density [mol/L]
1                  !number of terms associated with dilute-gas function
CI2                !pointer to reduced effective collision cross-section model
0.36652            !Lennard-Jones coefficient sigma [nm]
174.               !Lennard-Jones coefficient epsilon/kappa [K]
174.    10.0       !reducing parameters for T, eta
0.14105376 0.50d0  !Chapman-Enskog term
0                  !number of terms for initial density dependence
0 0 9 3 0 0        !# resid terms:  close-packed density;  simple poly; numerator of rational poly; denominator of rat. poly; numerator of exponential; denominator of exponential
190.551   10.139      12.149        !reducing parameters for T, rho, eta
 0.41250137   0.0    1.00  0.00  0
-0.14390912  -1.0    1.00  0.00  0
 0.10366993   0.0    2.00  0.00  0
 0.40287464  -1.0    2.00  0.00  0
-0.24903524  -1.5    2.00  0.00  0
-0.12953131   0.0    3.00  0.00  0
 0.06575776  -2.0    3.00  0.00  0
 0.02566628   0.0    4.00  0.00  0
-0.03716526  -1.0    4.00  0.00  0
 1.00000000   0.0    0.00  0.00  0
-0.38798341   0.0    1.00  0.00  0
 0.03533815  -1.0    1.00  0.00  0
NUL                !pointer to critical enhancement auxiliary function (none used)


@TCX               !thermal conductivity model specification
TC2  pure fluid thermal conductivity model of Younglove and Ely (1987).
?LITERATURE REFERENCE \
?Younglove, B.A. and Ely, J.F.,
? "Thermophysical properties of fluids. II. Methane, ethane, propane,
? isobutane and normal butane,"
? J. Phys. Chem. Ref. Data, 16:577-798, 1987.
?\
?N.B.  all temperatures on IPTS-68
?\
?The uncertainty in thermal conductivity is 5% in the liquid, 4% in the vapor,
?3% at T>Tc, and 8% in the critical region.
?\
!end of info section
90.6941            !lower temperature limit [K]
625.0              !upper temperature limit [K]
1000000.0          !upper pressure limit [kPa]
40.072             !maximum density [mol/L]
CI2                !pointer to collision integral model
0.368              !Lennard-Jones coefficient sigma [nm]
168.0              !Lennard-Jones coefficient epsilon/kappa [K]
0.1069188          !const in Eq 19 = 5/16*(k*MW/1000/pi/Na)**0.5*1.0d12
 0.1346953698d+1   !dilute gas terms (Eq 27):  Gt(1)
-0.3254677753d+0   !                           Gt(2)
 0.2325800819d-2   !residual terms (Eqs 26, 28-30): Et(1)
-0.2477927999d+0
 0.3880593713d+2
-0.1579519146d-6
 0.3717991328d-2
-0.9616989434d+0
-0.3017352774d-1
 0.4298153386d+0   !Et(8)
TK2                !pointer to critical enhancement model (follows immediately)
 37.42368d0        !critical enhancement terms (Eqs D1-D4):  X1
 3.16714d0
 0.78035d0
 0.60103d0         !X4
 6.512707d-10      !Z
 1.38054d-23       !Boltzmann's constant, k
  0.16969859271d+0 !coeff for initial density dependence of viscosity (eq 21); Fv(1)
 -0.13337234608d-1 !Fv(2)
  0.140d+1         !Fv(3)
  0.168d+3         !Fv(4)
 -0.1620427429d+2  !coefficients for residual viscosity, eqs (22 - 25)
  0.4270589027d+3  !Ev(2)  (the viscosity is also used in conductivity correlation)
  0.1402596278d+2  !Ev(3)
 -0.3916837745d+4  !Ev(4)
 -0.3477099090d-1  !Ev(5)
  0.2136542674d+2  !Ev(6)
  0.1436802482d+4  !Ev(7)


#AUX               !collision integral specification
CI2  collision integral model of Younglove and Ely (1987).
?LITERATURE REFERENCE \
?Friend, D.G., Ely, J.F., and Ingham, H.,
? "Tables for the Thermophysical Properties of Methane,"
? NIST Technical Note 1325, 1989.
?\
!end of info section
90.6941            !lower temperature limit [K]
625.0              !upper temperature limit [K]
0.0                !(dummy) upper pressure limit
0.0                !(dummy) maximum density
9                  !number of terms
 -3.0328138281
 16.918880086
-37.189364917
 41.288861858
-24.615921140
  8.9488430959
 -1.8739245042
  0.20966101390
 -0.009657043707


@TRN               !transport model specification
ECS  Extended Corresponding States model (Nitrogen reference); predictive mode.
?LITERATURE REFERENCES \
?Klein, S.A., McLinden, M.O., and Laesecke, A.,
? "An improved extended corresponding states method for estimation of
? viscosity of pure refrigerants and mixtures,"
? Int. J. Refrigeration, 20:208-217, 1997.
?\
?McLinden, M.O., Klein, S.A., and Perkins, R.A.,
? "An extended corresponding states model for the thermal conductivity
? of refrigerants and refrigerant mixtures,"
? Int. J. Refrigeration, 23:43-63, 2000.
?\
?the Lennard-Jones parameters are taken from:
?\
?Reid, R.C., Prausnitz, J.M., and Poling, B.E.,
? "The Properties of Gases and Liquids,"
? 4th edition, New York, McGraw-Hill Book Company, 1987.
?\
!end of info section
90.6941            !lower temperature limit [K]
625.0              !upper temperature limit [K]
1000000.0          !upper pressure limit [kPa]
40.072             !maximum density [mol/L]; next line is ref fluid EOS
FEQ Nitrogen.fld
VS1                !model for reference fluid viscosity
TC1                !model for reference fluid thermal conductivity
1                  !Lennard-Jones flag (0 or 1) (0 => use estimates)
0.3758             !Lennard-Jones coefficient sigma [nm] for ECS method
148.6              !Lennard-Jones coefficient epsilon/kappa [K] for ECS method
1  0  0                       !number of terms in f_int term in Eucken correlation, spare1, spare2
 1.3200d-3   0.0   0.0   0.0  !coeff, power of T, spare 1, spare 2
1  0  0                       !number of terms in psi (visc shape factor): poly,spare1,spare2
 1.0000d+0   0.0   0.0   0.0  !coeff, power of Tr, power of Dr, spare
1  0  0                       !number of terms in chi (t.c. shape factor): poly,spare1,spare2
 1.0000d+0   0.0   0.0   0.0  !coeff, power of Tr, power of Dr, spare


#STN        !surface tension specification
ST1  surface tension model of Somayajulu (1988).
?LITERATURE REFERENCE \
?Somayajulu, G.R.
? "A Generalized Equation for Surface Tension from the Triple Point to the
? Critical Point,"
? Int. J. Thermophys., 9(4):559-566, 1988.
?\
!end of info section
90.6941            !lower temperature limit [K]
190.564            !upper temperature limit [K]
0.0                !(dummy) upper pressure limit
0.0                !(dummy) maximum density
3                           !number of terms in surface tension model
190.55                      !critical temperature used in fit (dummy)
 0.0308936   1.25           !sigma0 and n
 0.0249105   2.25
-0.0068276   3.25


#DE         !dielectric constant specification
DE1  dielectric constant model of Younglove and Ely (1987).
?LITERATURE REFERENCE \
?Younglove, B.A. and Ely, J.F.,
? "Thermophysical properties of fluids. II. Methane, ethane, propane,
? isobutane and normal butane,"
? J. Phys. Chem. Ref. Data, 16:577-798, 1987.
?\
?The uncertainty in dielectric constant is 0.05%.
?\
!end of info section
83.80              !lower temperature limit [K]
150.6633           !upper temperature limit [K]
0.0                !(dummy) upper pressure limit
0.0                !(dummy) maximum density
190.555 1.0  1.0   !reducing parameters for t, d, and p
4 1 0 0 0 0                         !number of terms in dielectric constant model
  0.65701018d-2   0.    1.    0.    !coef, t exp, d exp, p exp
  0.63835013d-5   0.    2.    0.
 -0.18718728d-6   0.    3.    0.
 -0.94711735d-6   0.    1.    1.
 -0.53134820d-4   0.    1.    0.


#MLT        !melting line specification
ML1  melting line model of Setzmann and Wagner (1991).
?LITERATURE REFERENCE \
?Setzmann, U. and Wagner, W.,
? "A New Equation of State and Tables of Thermodynamic Properties for Methane
? Covering the Range from the Melting Line to 625 K at Pressures up to 1000 MPa,"
? J. Phys. Chem. Ref. Data, 20(6):1061-1151, 1991.
?\
!end of info section
90.6941            !lower temperature limit [K]
625.0              !upper temperature limit [K]
0.0                !(dummy) upper pressure limit
0.0                !(dummy) maximum density
90.6941  11.696    !reducing temperature and pressure
5 0 0 0 0 0                 !number of terms in melting line equation
 1.             0.          !coefficients and exponents
 0.247568d5     1.85
-0.736602d4     2.1
-0.247568d5     0.
 0.736602d4     0.


#SBL        !sublimation line specification
SB3  sublimation line model of Lemmon (2002).
?LITERATURE REFERENCE \
?Lemmon, E.W.,
? preliminary equation, 2002.
?\
!end of info section
90.6941            !lower temperature limit [K]
90.6941            !upper temperature limit [K]
0.0                !(dummy) upper pressure limit
0.0                !(dummy) maximum density
90.6941  11.696    !reducing temperature and pressure
0 1 0 0 0 0                 !number of terms in sublimation line equation
-12.84          1.          !coefficients and exponents


@END
c        1         2         3         4         5         6         7         8
c2345678901234567890123456789012345678901234567890123456789012345678901234567890