Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
An introduction to module 3 of a course on physics of combustion. It covers the objectives of lecture 12, which explores newton's law of viscosity, fourier's law of heat conduction, and fick's law of species diffusion. These laws describe the transport of momentum, heat, and species in a system.
Typology: Study notes
1 / 7
This page cannot be seen from the preview
Don't miss anything!
file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture12/12_1a.htm[10/5/2012 11:37:20 AM]
Newton's Law of Viscosity
Two parallel plates- separated by ‘Y' Lower plate is fixed At t< 0; system is at rest At t=0; upper plate is moved Velocity of plate: V (^) x
(Figure 12.1)
Where, μ is dynamic viscosity (kg/ms) dVx/dy is the shear strain rate -ve sign: momentum flux in the direction of decreasing velocity
Two parallel plates-separated by ‘Y'. Upper plate is maintained wet. Lower plate is kept dry (Dehydrating agent) Water vapour evaporates at upper plate Partial pressure of water vapour is maintained at saturated vapour pressure of water Thus concentration gradient exists between the two plates Mass flux-proportional to concentration, C (^) A inversely proportional to distance Y
Differential form of Fick's law
(Figure 12.3) Binary diffusitivity of species A through B
