def calculate(self, **state):
        """
        Calculate dynamic viscosity at the specified temperature and
        composition:

        :param T: [K] temperature
        :param x: [mole fraction] composition dictionary , e.g.
          {'CO': 0.25, 'CO2': 0.25, 'N2': 0.25, 'O2': 0.25}

        :returns: [Pa.s] dynamic viscosity

        The **state parameter contains the keyword argument(s) specified above
        that are used to describe the state of the material.
        """

        T = state['T']
        x = state['x']

        # normalise mole fractions
        x_total = sum([
            x for compound, x in x.items()
            if compound in materials])
        x = {
            compound: x[compound]/x_total
            for compound in x.keys()
            if compound in materials}

        mu = {i: materials[i].mu(T=T) for i in x.keys()}

        result = sum([mu[i] * x[i] * sqrt(M(i)) for i in x.keys()])
        result /= sum([x[i] * sqrt(M(i)) for i in x.keys()])

        return result
def calculate(self, **state):
        """
        Calculate dynamic viscosity at the specified temperature and
        composition:

        :param T: [K] temperature
        :param x: [mole fraction] composition dictionary , e.g.
          {'CO': 0.25, 'CO2': 0.25, 'N2': 0.25, 'O2': 0.25}

        :returns: [Pa.s] dynamic viscosity

        The **state parameter contains the keyword argument(s) specified above
        that are used to describe the state of the material.
        """

        T = state['T']
        x = state['x']

        # normalise mole fractions
        x_total = sum([
            x for compound, x in x.items()
            if compound in materials])
        x = {
            compound: x[compound]/x_total
            for compound in x.keys()
            if compound in materials}

        mu = {i: materials[i].mu(T=T) for i in x.keys()}

        result = sum([mu[i] * x[i] * sqrt(M(i)) for i in x.keys()])
        result /= sum([x[i] * sqrt(M(i)) for i in x.keys()])

        return result
def calculate ( self , * * state ) : T = state [ 'T' ] x = state [ 'x' ] # normalise mole fractions x_total = sum ( [ x for compound , x in x . items ( ) if compound in materials ] ) x = { compound : x [ compound ] / x_total for compound in x . keys ( ) if compound in materials } mu = { i : materials [ i ] . mu ( T = T ) for i in x . keys ( ) } result = sum ( [ mu [ i ] * x [ i ] * sqrt ( M ( i ) ) for i in x . keys ( ) ] ) result /= sum ( [ x [ i ] * sqrt ( M ( i ) ) for i in x . keys ( ) ] ) return result
Calculate dynamic viscosity at the specified temperature and
        composition:

        :param T: [K] temperature
        :param x: [mole fraction] composition dictionary , e.g.
          {'CO': 0.25, 'CO2': 0.25, 'N2': 0.25, 'O2': 0.25}

        :returns: [Pa.s] dynamic viscosity

        The **state parameter contains the keyword argument(s) specified above
        that are used to describe the state of the material.
Calculate dynamic viscosity at the specified temperature and composition :