Fluid Dynamics and Process Engineering - Coanda Research & Development

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Dilatant Flow Dynamics: Unraveling Unique Non-Newt $Dilatant Flow Dynamics: Unraveling Unique Non-Newtonian Behavior A unique and intriguing manifestation of non-Newtonian flow behavior is observed in dilatant (shear-thickening) flow. Dilatant materials experience a rise in viscosity when subjected to increased shear rates. This type of flow behavior is commonly observed in highly concentrated suspensions, as demonstrated by the widely recognized mixture of corn starch and water. Other notable instances of this behavior can be seen in the case of quicksand, moist beach sand, certain pharmaceuticals like penicillin suspensions, and emulsion-PVC mixed with plasticizers to produce plastisols. When subjected to high shear rates, the corn starch-water mixture displays solid-like characteristics, resisting flow. However, under low shear rates, the material undergoes a transition and starts flowing. In these scenarios, particles are densely packed, and the quantity of liquid introduced is precisely enough to occupy the spaces between the particles. At low shear rates, the suspension assumes a liquid-like state due to the effective lubrication of particle surfaces by the plasticizer, facilitating easy repositioning of particles under applied forces. However, at higher shear rates, particles begin to displace others, resulting in a general increase in volume. During this phase, the relative liquid fraction in the overall volume diminishes, leading to an insufficient amount to fill all voids and maintain full lubrication of particles. Consequently, the suspension undergoes a transition towards increased viscosity. The complex nature of dilatant flow underscores the importance of careful consideration and the selection of measurement techniques. Coanda, employing advanced rheometric methods, aims to investigate the complexities of dilatant flow in various materials, contributing to an improved understanding of their rheological characteristics. Material handling and preparation procedures, as well as setting appropriate measurement techniques allow us to successfully process and study these complex materials. #rheology #rheometric #NonNewtonian #dilatantflow #measurement #flow #flowdynamics$

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Solving industrial problems through science & technology

What We Do

Industries

Expertise

Services

News + Publications

Bayesian Optimization

Geologic CO2 Sequestration

Scaling the Caffeine Buzz

Coanda Cleantech Brochure

coandacanada

Strategic. Comprehensive. Client Focused.

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Solving industrial problems through
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