# critical density

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## critical density

See mean density of matter.

## critical density

[′krid·ə·kəl ′den·səd·ē]
(astronomy)
The mass density above which, it is believed, the expansion of the universe will slow down and reverse.
(chemistry)
The density of a substance exhibited at its critical temperature and critical pressure.
(civil engineering)
For a highway, the density of traffic when the volume equals the capacity.
(geology)
That degree of density of a saturated, granular material below which, as it is rapidly deformed, it will decrease in strength and above which it will increase in strength.
(thermodynamics)
The density of a substance at the liquid-vapor critical point.

## critical density

That unit weight of a saturated granular material above which it will gain strength and below which it will lose strength when subjected to rapid deformation.
References in periodicals archive ?
In the LWR model the characteristic speed vanishes exactly at the critical density where the traffic flow changes from free flow to congested flow.
Section 4 highlights the bond-percolation theory to derive and analyze the optimal critical density for exposure-path problem.
However, once the colony reached an even higher, critical density, enough AHL accumulated outside the cells forming a pool from which all the bacteria took their cue.
One natural question that arises in the context of Theorem 1 is the following: is there a nice graph class such that there a exists a critical density [c.
The universe indeed has a critical density of matter and energy.
The progression of interior spaces is organized around a major spine of common area facilities, independent of the service functions, yet the simple, traditional, double-loaded corridor allows for critical density and variety in unit sizes.
RB: Well, my feeling was that expressionist figuration had developed enough of a critical density by 1981 and that the only way I would be able to function was in an adversarial way.
The previous lattice-based traffic models produce sudden phase transition from free flow to complete jamming of moving objects at a critical density.
Once the peptide reaches a critical density in stationery growth ph ase, it is sensed by VncS, which acts as a phosphatase to dephosphorylate the response regulator, VncR.
The key to the area is its critical density of high profile fashion designers, coupled with its tourist draw.
The feeding response observed in the field experiment suggests that this critical density is lower.

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