# Toronto Math Forum

## APM346-2022S => APM346--Lectures & Home Assignments => Chapter 2 => Topic started by: Yifei Hu on January 18, 2022, 07:34:32 PM

Title: Transport Equation Derivation
Post by: Yifei Hu on January 18, 2022, 07:34:32 PM
Can anyone help explain where does the Ut term in the second last line come from? Thanks
Title: Re: Transport Equation Derivation
Post by: Victor Ivrii on January 19, 2022, 05:06:34 AM
It would be really helpfull if you explained where you took this from (if online TextBook--then section and equation number, if lecture then which lecture and which part).
Title: Re: Transport Equation Derivation
Post by: Yifei Hu on January 23, 2022, 10:17:29 PM
Hi Professor Ivrii, this comes from Christopher's lecture #3 when he discussed transport equation, directly from his lecture notes #3 on top of page 2 : )
Title: Re: Transport Equation Derivation
Post by: Victor Ivrii on January 24, 2022, 05:46:09 AM
Then your best shot would be
• either to ask during Prof Kennedy's Office hours
• or to formulate the problem and define everything  (that is $u, v, S, \tilde{S}$) here by yourself without screenshots
My guess that it is a continuity condition.