Q2. Write down all incorrect sentencel(s) (if any) from the list below (10 point

Question

Q2. Write down all incorrect sentencel(s) (if any) from the list below (10 points). -In a shearing fluid, normal stresses do not have to be equal to pressure -There is a maximum of 3 independent shear stress components. -A rheopectic fluid shows higher apparent shear viscosity with an increase in shear rate and time. -A non-stationary fluid undergoes shear. Viscosity of He (helium) increases proportional to square root of absolute temperature. -The absolute value of shear rate is always equal to V/Y for simple shear flow between parallel plates, where V is the velocity of the bottom plate, Y is the distance, and top plate is stationary

Explanation / Answer

1. Yes shear stress is not equal to pressure because both are varying perpendicular to each other if flow is horizontal direction then pressure gradient exerted in horizontal and shear stress in vertical direction.

2. False. Becuase there is total 9 shear stresses but in which only 6 independent shear stresses.

3. True. Rheopectic fluid viscosity increases with increasing time and shear rate.

4. True. Not stationary fluid having always a shear stress because it having movement so due to viscosity it having shear stress.

5. True . Beacuse He is a gas and viscosity of gas is directly proportional to square root of temperature.

6. True. Because shear rate is velocity gradient with respect to y direction if fluid flow in x direction then absolute shear rate is

dv/dy = v2-v1 /y2 -y1 = 0 - v / 0- y = v/ y

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.