Posted: January 9th, 2022

Using Figure 1-7, determine the fluid viscosity of a 10W petroleum based fluid at an operating temperature of 50∘C. Using Equation (1.111) convert this result to the μReyn and the centi-poise scale.

A 10W hydraulic fluid is nominally used at 70∘F and atmospheric pressure. Using Equation (1.112) and Figure 1-7 calculate the fluid property 𝜆 if the temperature is increased to 200∘F. If the pressure is also increased to 6000 psi what is the new viscosity? Does the pressure have much effect in your opinion?

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