Knowledge card
Constant Powell–Eyring δ requires an explicit local-similarity assumption
With physical material constants β and ς, δ carries x²(1−γt)^{-3}; the reduced equation is local/quasi-similar. Making δ globally constant by assigning x,t dependence to material constants is a mathematical device, not a physical constitutive law.
Dimension I
Definition
What it is — and what it is not
- What it is
- S1Correction and justification — With physical material constants β and ς, δ carries x²(1−γt)^{-3}; the reduced equation is local/quasi-similar. Making δ globally constant by assigning x,t dependence to material constants is a mathematical device, not a physical constitutive law. [1.1]
Dimension II
In practice
How to deal with it
No practical guidance recorded yet.
copyright© owned by Webiscopic Sdn. Bhd. 2026. All right reserved.
vproductionmain @ 5d8445a3