Learning Forum

[Abubakar]

I am doing CHT analysis on exhaust port the velocity is not constant along the pipe. So what should be the velocity and characteristic length to be considered for calculating y+?n

[Keyur Kanade]

Please have a look at n

https://us.v-cdn.net/6032193/uploads/E91NTXZUKD7K/cells-png.pngDear all,I'm new to CFD. Can some suggest me the characteristic length for this geometry if one the cell is emitting gas and it travels through the voids?/forum/discussion/21478/charcterisitc-length

Regards,nKeyurnHow to access Ansys Online Help DocumentnHow to show full resolution imagenGuidelines on the Student CommunitynHow to use Google to search within Ansys Student Communityn

[Abubakar]

sir, nI went through the link which asked me to look but in that article (please find the attachment) I can't find anything useful please help.nnnThank you,nAbubakar khan n

[Kalyan Goparaju]

Hello Abubakar, nSince you mention that the flow is through a pipe, I would perhaps use the pipe diameter as the characteristic length. As for the velocity, perhaps average velocity on the exit plane is a good starting point. nThanks,nKalyann

[Abubakar]

Thank you sir n

[Amine Ben Hadj Ali]

You just need to use an eligible relationship for skin friction which is valid for internal flows if you have that.Tips & Tricks: Estimating the First Cell Height for correct Y+ | Computational Fluid Dynamics (CFD) Blog ? LEAP Australia & New Zealandn

[Abubakar]

Thank you Sirn

[Amine Ben Hadj Ali]

Welcome n