Basic Fluid Mechanics question
 

My Fluid Mechanics teacher once told me, there are 2 types of friction factors (say, in connection with pipe flows). I remember, one is Darcy-Weisbachs' other one is Mannings (?). Wondering if there is a unified view (or) simply both are different ? can some learned soul clear my confusion.

Re: Basic Fluid Mechanics question
 

THe other is Fanning. One of them is four times the other. Check a textbook.

Re: Basic Fluid Mechanics question
 

(1) on which principle Hot Air baloon works ? & give the details of principle,with some more examples

Re: Basic Fluid Mechanics question
 

Dear Basavaraj,

Hot air ballon works on the principle that when air becomes hot, it turns lighter and will try to go upward. This drives the balloon upward. Hoe this will help u

regards Kasyap

Re: Basic Fluid Mechanics question
 

Read about buoyancy ...