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Specific Heat Capacity


Isobaric specific heat capacity 

c_{p}(P,T) = \frac{1}{m} \frac{dQ}{dT} \big|_{P = const}

Isochoric specific heat capacity 

 

  c_{v}(P,T)= \frac{1}{m} \frac{dQ}{dT} \big|_{V = const}


Thermal conductivity


  \bar j = \frac{dQ}{dt \ dS} \ \bar n_{dS} = \lambda(P,T) \bar \nabla T – differential flux across the differential area   dS


Temperature conductivity


  a(P,T) = \frac{\lambda}{c_{p} \ \rho}


Reference values for popular fluids



\rho, \ 10^3 \ \rm kg/m^3

С_р, \ \rm kJ/(kg \cdot °С)

\lambda , \ \rm W/(m \cdot °С)

a, \ 10^{-6} \ \rm m^2/s

gas





oil

 0.65 – 1.05

(0.82 – 0.95)*

1.7 – 2.1

0.12 – 0.14

0.07 – 0.09

water

1

4.183

0.6

0.14


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