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Shear Thickening Fluids (Dilatant), for hydraulics #5156943 07/10/19 04:14 PM
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solocraftvs Offline OP
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I've often heard that Audi had a shear thickening fluid in their AWD systems. But, I've never been able to substantiate that. But, what I'm really just looking for is to see if there is a dilatant fluid that is NOT a colloidal suspension. It seems there are a variety of shear thickening fluids (dragon skin and similar bullet proof materials). But, All of those are made up of little tiny micro-particles. While I could be wrong, it seems as though filling a hydraulic system with particles is a bad idea. Any thoughts are appreciated.
Thanks!

Wiki on Dilatants

Re: Shear Thickening Fluids (Dilatant), for hydraulics [Re: solocraftvs] #5156964 07/10/19 04:38 PM
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Imp4 Offline
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Well, you link states:

Quote
The parameters that control shear thickening behavior are: particle size and particle size distribution, particle volume fraction, particle shape, particle-particle interaction, continuous phase viscosity, and the type, rate, and time of deformation. In addition to these parameters, all shear thickening fluids are stabilized suspensions and have a volume fraction of solid that is relatively high.


So your reference seems to think that a colloidal suspension is certainly the most widely observed instance of this condition.


2001 Mitsubishi Galant 2.4 - 165k+
Grandma's creampuff...
Re: Shear Thickening Fluids (Dilatant), for hydraulics [Re: solocraftvs] #5156965 07/10/19 04:38 PM
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Rand Offline
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cant you just use a thicker oil?


2019 Jeep Cherokee Trailhawk 2.0T
2020 Hyundai Elantra "Value Edition"
Re: Shear Thickening Fluids (Dilatant), for hydraulics [Re: solocraftvs] #5158509 07/12/19 08:39 AM
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MolaKule Offline
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Here is a background paper on STF's:

STFs


I'm a Student Pilot. Frightening, isn't it?
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