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 |