temperature gradient


Also found in: Dictionary, Thesaurus, Acronyms, Wikipedia.

temperature gradient

[′tem·prə·chər ‚grād·ē·ənt]
(thermodynamics)
For a given point, a vector whose direction is perpendicular to an isothermal surface at the point, and whose magnitude equals the rate of change of temperature in this direction.
References in periodicals archive ?
Temperature gradients during heat treatment were measured by inserting a thin thermocouple at different positions in the thickness of the sample.
Evaluation of temperature gradient capillary electrophoresis for detection of the factor V Leiden mutation: coincident identification of a novel polymorphism in factor V.
The AZS with [beta] = 0.2 (corresponding to a temperature gradient of 136 K (245[degrees]F) for every two zones) creates four zones for the first floor (0-8 m [26 ft]) and one zone in the secod, whereas [beta] = 0.05 (corresponding to a temperature gradient of 34 K [63[degrees]F]) results in 15 zones for the first and 3 zones in the second.
It is observed from these figures that, for any type of nanoparticles, as the nanoparticle volume fraction [phi] increases, both the surface velocities and the temperature gradients decrease, which is again in agreement with Figures 3 and 4.
These defects act as additional scattering centers and result in a region of large temperature gradient, which translates to a reduction in the thermal conductivity of the crystal [26].
Caption: Figure 10: Temperature gradient distribution in the arch rib model.
Temperature gradient exceeded 5.4[degrees]F (3[degrees]C) at 75.2[degrees]F (24[degrees]C) supply air, and increased even further when the supply air temperature was raised to 82.4[degrees]F (28[degrees]C) (Figure 3).
ROC curve analysis showed that core to peripheral temperature gradient and blood lactate levels had similar predictive values for increased risk of mortality (area under the curve, 0.807 and 0.877 respectively) with the best cut-off values of 2.90C for core to peripheral temperature gradient and 36 mg/dL for blood lactate levels.
This is the main reason for the temperature gradient of PPCC being greater than that of PCC.
In the following, some details of the fitting process and the calculation of vertical temperature gradient are illustrated.
where [Z.sub.S](x, t) is the concrete tensile strength standard value; [Z.sub.D](x, t) is the dead load effect after the bridge completed; [Z.sub.D](x, t) is the measured vehicle load effect; [Z.sub.T](x, t) is the measured temperature gradient load effect; [[phi].sub.0](x,t) is the time variation function of the dead load effect; [[phi].sub.1] (x, t) is the time variation function of the vehicle load effect; and [[phi].sub.2](x,t) is the time variation function of the temperature gradient effect.

Full browser ?