Q:
Propellants that are thick or viscous under static conditions, but flow through valves, injectors, pipes or pumps when adequate shear stress is applied are called __________ propellants.
Answer & Explanation
Answer: A) Thixotropic
Explanation: Thixotropic fluids become thinner (or less viscous) over time when adequate shear stresses are applied on it. A dilatant material has increasing viscosity with the rate of shear strain. A Newtonian fluid is a fluid in which the viscous stresses arising from its flow is linearly proportional to the local strain rate. Non-Newtonian fluids are those fluids that doesn’t obey Newton’s law of viscosity (which states that the shear stress between two adjacent fluid layers is proportional to the negative value of velocity gradient between those two layers).
View Answer
Discuss