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Which of the following is an example of Bingham plastic?

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in Bioprocess Engineering by (80.7k points)
Which of the following is an example of Bingham plastic?

(a) Blood

(b) Starch

(c) Paints

(d) Toothpaste

This question was posed to me in class test.

Origin of the question is Non Newtonian Fluids topic in chapter Fluid Flow and Mixing of Bioprocess Engineering

1 Answer

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Best answer
Correct choice is (d) Toothpaste

Easiest explanation: A Bingham plastic is a viscoplastic material that behaves as a rigid body at low stresses but flows as a viscous fluid at high stress. It is used as a common mathematical model of mud flow in drilling engineering, and in the handling of slurries. A common example is toothpaste, which will not be extruded until a certain pressure is applied to the tube. It then is pushed out as a solid plug.

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