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133 lines
3.8 KiB
Python
Executable File
133 lines
3.8 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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