Flow Separation and Reattachment - Lesson 4

[@zaynezaman]

Very clear and concise explanation, thank you

[@AnsysLearning]

Glad you liked it! Visit Ansys Innovation Courses for free courses that include videos, handouts, simulation examples with starting files, homework problems, and quizzes here: ansys.com/courses.

[@alexeykrylov9995]

6:58 dimension mismatch in the second equation: the right-hand side is dimensionless, while the left-hand side in 1/[x]. So, it can't be right.

[@AnsysLearning]

Thanks for watching & providing feedback! Visit Ansys Innovation Courses for free courses that include videos, handouts, simulation examples with starting files, homework problems, and quizzes here: ansys.com/courses.

[@disruptivegarage]

thx for the clear explanation

[@AnsysLearning]

You're welcome! Visit Ansys Innovation Courses for free courses that include videos, handouts, simulation examples with starting files, homework problems, and quizzes here: ansys.com/courses.

[@disruptivegarage]

@@AnsysLearning you dont say. This happens to be what i need

[@nikkhil96]

It's still not very clear how the pressure gradient along a horizontal flat would be negative? Could you kindly elaborate? Thank You.

[@AnsysLearning]

Thanks for watching! Please post your query on the Ansys Learning Forum for a detailed answer from the wider Ansys Community: ansys.com/forum.

[@manthanparekh8703]

Consider a Fully-Developed laminar flow over a flat plate, hence constant velocity and no acceleration. For such a case, the only force which is opposing the flow is the force (resistance) due to shear (viscous) stress on the plate surface. Now, as the mass (flow rate) needs to be conserved, the flow needs to overcome this opposing force . It overcomes this force by a corresponding decrease in pressure along the direction of the flow. This pressure difference results in a force opposing the viscous force. So to sum up, a force is required to push the fluid against the viscous force (also known as flow work/flow energy), which is provided by this pressure difference. Pressure gradient would be -ve as well as constant for this case. If the flow was additionally inviscid, then there would be no viscous force, hence no pressure gradient. Hope it helps.

[@him31anshu]

Nice. Good

[@AnsysLearning]

Thanks for watching! Visit Ansys Innovation Courses for free courses that include videos, handouts, simulation examples with starting files, homework problems, and quizzes here: ansys.com/courses.