0 present participle of pile --
2 (of a group of people) to move together, especially in an uncontrolled way: --
The inclusion of density diffusion would inhibit the extreme piling up of the density surface, and prevents the generation of the jet which would appear if the fluid is non-diffusive.
This piling up of official notes could scarcely deceive the involved parties about the fact that to negotiate a modus vivendi to both sides' satisfaction was virtually impossible.
While the diffusion halts the piling-up of isopycnals and prevents the generation of singularities and the jet, the strong buoyancy force generates a large vertical velocity.
A party which avoids piling up huge majorities in its safer constituencies while managing to win a disproportionate number by relatively small margins will benefit from efficiency bias.
For if a higher pleasure only has a finite value, then that value sooner or later would be reached, if we started piling up lower pleasures.
The density diffusion prevents the extreme piling up of the isopycnal surfaces and allows the existence of a steady solution, preventing the generation of a singularity or a jet.
Some restriction on the starting state is necessary to prevent the process 'exploding', with infinitely many particles piling up at a single site.
Otherwise, the equilibrium solution of (2.9) is simply the piling up of all modal energies on the upper truncation mode.
