It is aviation related, I'm reading aerodynamics for naval aviators....
Another question…
The viscosity or air (or its resistance to flow) increases with temperature, thus air in the summer time is more viscous but less dense?
What I’m a bit confused about is the concept of the coefficient of absolute viscosity. I understand absolute viscosity is a measure of viscosity, any idea what sort of units that measure is or am I way off here? In following the coefficient of absolute viscosity would simply be a constant. Is it a constant derived from standard temperature?
So to clarify what I think (which is probably off) the terms are…
Viscosity – just the resistance to flow. Honey has more viscosity than water.
Absolute Viscosity – some measure of viscosity. I don’t understand the unit of measure here.
coefficient of absolute viscosity – A standard value for absolute viscosity, which as it varies with temperature, I assume is essentially the absolute viscosity of air at standard temperature.
Finally, if I divide my coefficient of absolute viscosity by the density of the air (in slugs I assume) I get kinematic viscosity which is measured in square feet per second. This unit has me lost as well. I assume a value for sea level such as .000158 square feet per second at 59 deg. Fahrenheit is giving us the portion of the whole that will resist flow. That is, .000158 of each square foot will not flow?
Another question…
The viscosity or air (or its resistance to flow) increases with temperature, thus air in the summer time is more viscous but less dense?
What I’m a bit confused about is the concept of the coefficient of absolute viscosity. I understand absolute viscosity is a measure of viscosity, any idea what sort of units that measure is or am I way off here? In following the coefficient of absolute viscosity would simply be a constant. Is it a constant derived from standard temperature?
So to clarify what I think (which is probably off) the terms are…
Viscosity – just the resistance to flow. Honey has more viscosity than water.
Absolute Viscosity – some measure of viscosity. I don’t understand the unit of measure here.
coefficient of absolute viscosity – A standard value for absolute viscosity, which as it varies with temperature, I assume is essentially the absolute viscosity of air at standard temperature.
Finally, if I divide my coefficient of absolute viscosity by the density of the air (in slugs I assume) I get kinematic viscosity which is measured in square feet per second. This unit has me lost as well. I assume a value for sea level such as .000158 square feet per second at 59 deg. Fahrenheit is giving us the portion of the whole that will resist flow. That is, .000158 of each square foot will not flow?
