viscosity in liquids and gases is said to be caused by friction within the them, so if this was true the more preasure you applied on a confinated liquid would cause more friction within it, so it would have more viscosity.
probably i am missunderstanding the term friction.
2007-02-08 14:58:13 · 4 answers · asked by iker_percontari 1 in Science & Mathematics ➔ Other - Science
The answer is yes, to varying degrees.
The term for this is "viscoelasticity". For more information, look into Maxwell's equation, which is a widely accepted (albeit simplified) model.
To simply answer, consider a pool of water - dip your hand into the water slowly or slap your hand against it. In the first case, the material is not viscous, and in the second, it's "hard". This is why falling a long distance into water can still kill a person.
You can think of this on the molecular level, too. Molecules/atoms take different amounts of time to respond to an external force. If you apply the force quicker than that amount of time, the structure will not have time to react, and it will appear hard. If you apply force slowly, it will have time to react to the force, and it will give.
No matter how you dissect it, viscosity usually increases when pressure is applied.
2007-02-09 10:23:01 · answer #1 · answered by Atgmelv 2 · 0⤊ 0⤋
I'm not sure what effects viscosity, but in general viscosity is defined as resistance to flow.
Where do you find that viscosity is caused by friction within the "liquid"? Is it necessarily a direct relationship?
That is, does viscosity go up when internal friction in the liquid goes up; or maybe viscosity goes DOWN when internal friction in the liquid goes up (an inverse relationship).
Most liquids are virtually incompressible; temperature tends to be a greater factor in affecting the viscosity of liquids in the circumstances that I imagine.
2007-02-08 15:34:56 · answer #2 · answered by answerING 6 · 0⤊ 0⤋
Viscocity of fluids can be changed by shear, which is not quite the same as pressure.
Different fluids behave in different ways. Some thin with shear (the most common behaviour) while others thicken. Shear thickening fluids are called thixotropic. They are very important because they show unusual properties. Quick sand, treacle, egg white, non-drip paint and custard are all thixotropic.
2007-02-08 20:08:06 · answer #3 · answered by Anonymous · 1⤊ 0⤋
maybe a bit with liquids and I guess more with gases since they can be compressed more.
2007-02-08 15:02:21 · answer #4 · answered by JiveSly 4 · 0⤊ 0⤋