Thermal gradient


Also found in: Acronyms.

thermal gradient

[′thər·məl ′grād·ē·ənt]
(geophysics)
The rate of temperature change with distance; for example, its increase with depth below the surface of the earth.

Thermal gradient

The difference in temperature between the floor and the ceiling.
References in periodicals archive ?
No correlation was observed, suggesting that thermal gradients are not affecting our results.
Development of a thermal gradient begins at dawn and changes hourly, maintaining the potential for heating.
[T.sub.set] Set-point range of [T.sub.b]s: This is taken to be the central 50% of the [T.sub.b]s selected in a laboratory thermal gradient.
However, thermal characterization of the two pipes confirms smaller thermal gradient during the processing of the thinner wall pipe.
This seems to indicate that the fibrils are turning only because of the selection of the fastest path by branching and not because of the thermal gradient producing different growth velocities on both sides of a fibril of finite width, as suggested by Lovinger and Gryte (19).
If the community requires fronts to have temperature gradients as the synoptic-dynamic literature and synoptic experience imply, then fronts should be a subset of airmass boundaries with a requisite thermal gradient and possibly also Petterssen frontogenesis along it.
The Niyama criteria is an equation that provides a good way to think about how to cast long freezing range alloys and gives you a relationship between the cooling rate and thermal gradient. Different alloys have different Niyama criterion.
The bottom boundary was set as an impermeable and constant thermal gradient, while the top was set as a cosine hydraulic head and temporally variable Dirichlet temperature boundary.
Larval acute thermal preference ([T.sub.pref]) (Reynolds & Casterlin 1979) and thermal influence on swimming speed (U) were measured in larvae from each of the three spawning events using a horizontal thermal gradient. This enabled the larvae to choose a temperature while removing the influence of gravity and the tendency of abalone larvae to crowd at the tank surface (Prince et al.
Researchers also report that the allowable temperature change under steadystate conditions scales with pavement thick ness and joint spacing, and (as shown in the figure) that the energy release rate due to the change in thermal gradient can be higher than its corresponding value in a steadystate condition.
Brooks and Adam have demonstrated a thermal gradient across the trace, hottest along the centerline and cooling out toward the edge of the trace.
Figure 3 clearly shows how the thermal gradient occurs through the insulation small thickness of 4 cm.