The variation of the surface tension σ (SI unit: N/m)
with temperature at fluid interfaces must be taken into account for the computation of phenomena such as the Marangoni effect. These temperature dependencies are available in the form of a coefficient library for a set of liquid-gas interfaces.
where T (SI unit: K) is the temperature.
where T0 is a reference temperature taken at 0°C (273.15 K) and the coefficients
A (SI unit: N/(m·K)) and
B (SI unit: N/m) are given in the following table for some liquid-gas interfaces:
