2528df0f75
These changes make it unnecessary to copy header files around during the build process, which tends to confuse IDEs and debuggers. The headers which comprise Cantera's external C++ interface are now in the 'include' directory. All of the samples and demos are now in the 'samples' subdirectory.
134 lines
3.9 KiB
Python
Executable file
134 lines
3.9 KiB
Python
Executable file
from exceptions import CanteraError
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def setByName(a, options):
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"""Set properties of phase 'a' by specifying keywords. Either the full
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property name or the short form may be given. The capitalization must
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be exactly as shown here.
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Note: all extensive property values are specified for a unit mass
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- i.e., the *specific* (not molar) property value should be
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specified.
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keyword short form property
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--------------------------------------------
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Pressure P pressure
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Density Rho density
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Temperature T temperature
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Volume V specific volume
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MoleFractions X mole fractions
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MassFracttions Y mass fractions
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Enthalpy H specific enthalpy
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IntEnergy U specific internal energy
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Entropy S specific entropy
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Vapor Vap vapor fraction in a two-phase mixture
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Liquid Liq liquid fraction in a two-phase mixture
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"""
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tval = None
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pval = None
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hval = None
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uval = None
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sval = None
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vval = None
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qval = None
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np = 0
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nt = 0
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nv = 0
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nx = 0
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ny = 0
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ns = 0
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nh = 0
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nu = 0
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nq = 0
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for o in options.keys():
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val = options[o]
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if o == 'Temperature' or o == 'T':
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nt += 1
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tval = val
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elif o == 'Density' or o == 'Rho':
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nv += 1
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vval = 1.0/val
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elif o == 'Volume' or o == 'V':
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nv += 1
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vval = val
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elif o == 'MoleFractions' or o == 'X':
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nx += 1
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a.setMoleFractions(val)
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elif o == 'MassFractions' or o == 'Y':
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ny += 1
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a.setMassFractions(val)
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elif o == 'Pressure' or o == 'P':
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pval = val
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np += 1
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elif o == 'Enthalpy' or o == 'H':
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hval = val
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nh += 1
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elif o == 'IntEnergy' or o == 'U':
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uval = val
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nu += 1
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elif o == 'Entropy' or o == 'S':
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sval = val
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ns += 1
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elif o == 'Vapor' or o == 'Vap':
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nq += 1
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qval = val
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elif o == 'Liquid' or o == 'Liq':
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nq += 1
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qval = 1.0 - val
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else:
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raise CanteraError('unknown property: '+o)
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if nx + ny > 1:
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raise CanteraError('composition specified multiple times')
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nn = [nt, np, nv, ns, nh, nu, nq]
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for n in nn:
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if n > 1:
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raise CanteraError('property specified multiple times')
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ntot = nt + np + nv + ns + nh + nu + nq
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# set individual properties
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if ntot == 1:
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if nt == 1:
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a.setTemperature(tval)
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elif nv == 1:
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a.setDensity(1.0/vval)
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elif np == 1:
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a.setPressure(pval)
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else:
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props = options.keys()
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raise CanteraError('property '+props[0]+
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' can only be set in combination with '
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+'another property')
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# set property pairs
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elif ntot == 2:
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if np == 1 and nh == 1:
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a.setState_HP(hval, pval)
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elif nu == 1 and nv == 1:
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a.setState_UV(uval, vval)
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elif ns == 1 and np == 1:
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a.setState_SP(sval, pval)
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elif ns == 1 and nv == 1:
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a.setState_SV(sval, vval)
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elif nt == 1 and np == 1:
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a.setState_TP(tval, pval)
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elif nt == 1 and nv == 1:
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a.setState_TR(tval, 1.0/vval)
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elif nt == 1 and nq == 1:
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a.setState_Tsat(tval, qval)
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elif np == 1 and nq == 1:
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a.setState_Psat(pval, qval)
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else:
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raise CanteraError('unimplemented property pair')
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def set(a, **options):
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setByName(a, options)
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