More seriously for this model, it does not predict high enough values for the bulk flow on scales, by.
In this example, kinetic energy of bulk flow and potential energy with respect to long-range external forces such as gravity are both considered to be zero.
The sieve elements contents are physically pushed along the transportation pathway by bulk flow.
The result of main interest is bulk flow.
Advective transport describes the movement of some quantity via the bulk flow of a fluid (as in a river or pipeline).
As there is no difference in total pressure across the element (no bulk flow), dP/dx must equal .
In applications to gas dynamics, the diffusion flux and the bulk flow should be joined in one system of transport equations.
The bulk flow describes the mass transfer.
It is thus this process which is termed bulk flow.
The second mechanism of capillary exchange is bulk flow.