Two-fluid model is a
macroscopic traffic flow model A Macroscopic traffic flow model is a mathematical traffic model that formulates the relationships among traffic flow characteristics like density, flow, mean speed of a traffic stream, etc.. Such models are conventionally arrived at by integrating ...
to represent traffic in a town/city or metropolitan area, put forward in the 1970s by
Ilya Prigogine
Viscount Ilya Romanovich Prigogine (; russian: Илья́ Рома́нович Приго́жин; 28 May 2003) was a physical chemist and Nobel laureate noted for his work on dissipative structures, complex systems, and irreversibility.
Biogra ...
and Robert Herman.
There is also a two-fluid model which helps explain the behavior of
superfluid helium. This model states that there will be two components in liquid helium below its
lambda point (the temperature where superfluid forms). These components are a normal fluid and a superfluid component. Each liquid has a different density and together their sum makes the total density, which remains constant. The ratio of superfluid density to the total density increases as the temperature approaches absolute zero.
External links
Two Fluid Model of Superfluid Helium
References
{{Reflist
Mathematical modeling
Traffic flow
Superfluidity