Related Experiment Video
Updated: Aug 21, 2026

Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
Published on: June 1, 2016
Rheothermodynamics of the Doi-Edwards reptation model
1Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand.
Abstract:
The Doi-Edwards reptation model is found to be thermodynamically consistent, both in the Independent Alignment Approximation and in its full formulation including the effect of tube extension. In the latter case, a new expression for the stress tensor is uncovered. Both the stress and the birefringence tensors after a step shear gamma obey the Lodge-Meissner relation; when gamma>>1 the shear stress at t=0(+) is proportional to gamma(-1)lngamma, the first normal stress is proportional, lngamma and both the stress-optical law and the time-strain factorability are violated. A principle of virtual work applies to fast deformations.
Related Concept Videos
Joule-Thomson Effect
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...
Mechanisms of Heat Transfer II
Mechanisms of Heat Transfer I
Mechanism of heat transfer
Mechanisms of Heat Transfer
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant heat.
Thermodynamics: Activity Coefficient
The activity coefficient is a measure of the deviation from ideal behavior. When the ionic strength of the solution is minimal, the activity coefficient of an ionic species is close to unity, making...

