Question

Effect of temperature on viscosity of fluids formula

Answer 1

The former effect causes a decrease in the shear stress while the latter causes it to increase. The result is that liquids show a reduction in viscosity with increasing temperature. With high temperatures, viscosity increases in gases and decreases in liquids, the drag force will do the same.
How does Temperature Change Viscosity in Liquids and Gases?
Download
PDF Copy
View
Supplier
Profile
Request
Quote
Sponsored by FungilabSep 23 2013
Topics Covered
Introduction
Impact of Increasing Temperature
About Fungilab

Introduction
With an increase in temperature, there is typically an increase in the molecular interchange as molecules move faster in higher temperatures.

The gas viscosity will increase with temperature. According to the kinetic theory of gases, viscosity should be proportional to the square root of the absolute temperature, in practice, it increases more rapidly.

In a liquid there will be molecular interchange similar to those developed in a gas, but there are additional substantial attractive, cohesive forces between the molecules of a liquid (which are much closer together than those of a gas). Both cohesion and molecular interchange contribute to liquid viscosity.