how should i set the min. size? -- CFD Online Discussion Forums

June 3, 2018, 10:22	how should i set the min. size?	#1
songkai New Member Songkai Yang Join Date: Apr 2018 Posts: 22 Rep Power: 8	Hello everyone, i want to simulate wand jet through the compared of DNS and RANS with wall function. The inlet velocity(U0) is changing with time, the max. velocity is 725m/s. If firstly via DNS simulate, how should i set the min. size of meshing. In my opinion, using max. maximum velocity in the streamwise direction(Um) and assume y+=1, then calculate the distance from first grid to wall as the min. size of meshing, but i am really not sure. If i am right, how to calculate or estimate Um? Which relationship between Um and inlet velocity U0? Someone can help me? Thanks ad. Songkai

Posting Rules
You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Trackbacks are Off Pingbacks are On Refbacks are On Forum Rules

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How to set up Time Step Size correctly ?	shuai_manlou	FLUENT	1	July 9, 2012 04:50
OF 1.6 \| Ubuntu 9.10 (64bit) \| GLIBCXX_3.4.11 not found	piprus	OpenFOAM Installation	22	February 25, 2010 13:43
Problems in compiling paraview in Suse 10.3 platform	chiven	OpenFOAM Installation	3	December 1, 2009 07:21
[Commercial meshers] ST_Malloc: out of memory.malloc_storage: unable to malloc Velocity SA,	cfdproject	OpenFOAM Meshing & Mesh Conversion	0	April 14, 2009 15:45
Help with GNUPlot	Renato.	Main CFD Forum	6	June 6, 2007 19:51

All times are GMT -4. The time now is 19:48.