viscosity change 100-150°c

[chajla]

this is from an older thread by caterham:

"We also know that viscosity change with temperature has lost the parabolic effect that occurs at low temp's and from 100C to 150C and higher, viscosity change with temperature is virtually linear."

could you (or somebody else) expand on the "linear" part? what viscosity are we talking about and are you really saying the change will be proportional or did you mean in relation to the logarithm or ...?

Dimensionless numbers, mathematical modelling & VI

In physics, as it's often impossible to model something full scale, mathematical models are produced, which can predict a) how a system behaves; and b) how a model will behave when smaller than the machine to be designed. A key tool in this modelling is "dimensionless numbers", which are...

bobistheoilguy.com

 

[Tom NJ]

Viscosity vs temperature is a log/linear relationship. When so plotted, the curve is flat (at higher temperatures) and so is referred to as linear, meaning in the plot. It begins to curve at low temperatures, exactly where depends on the chemistry.