# aspect ratio

 Register Blogs Members List Search Today's Posts Mark Forums Read

 February 26, 2004, 11:50 aspect ratio #1 Joe Guest   Posts: n/a Hi you all! I have problems to solve my calculation. I figured out that my aspect ratio is way to high. The cfx guideline tells me that if I use a thetra mesh I should have a maximum ar of 100. Could someone please explain to me how the aspect ratio is defined and maybe how to lower it. Thanks a lot Joe

 February 26, 2004, 12:06 Re: aspect ratio #2 Dang Guest   Posts: n/a For rotating machine, increasing the number of element in the span direction will reduce the aspect ratio.

 February 26, 2004, 12:17 Re: aspect ratio #3 Joe Guest   Posts: n/a Yep, that`s what I thougt. ICEM just finished the new mesh. Hopefully it works better now. Thank`s a lot, Joe

 February 26, 2004, 17:13 Re: aspect ratio #4 Glenn Horrocks Guest   Posts: n/a Hi Joe, More generally, for a rectangular hex element, aspect ratio is defined as the longest edge length over the shortest edge length. For other element types there are other definitions (see the CAD2Mesh documentation), but they have the same idea of the longest element length over the smallest. Element aspect ratio is a function of the way you have meshed your geometry. You have ended up with flat, wide elements somewhere. Also keep in mind that hex elements run much better than tet elements at thigh aspect ratio, especially if the flow is aligned with the hex elements. Regards, Glenn

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post oort OpenFOAM 5 September 16, 2011 14:06 maddalena OpenFOAM Running, Solving & CFD 69 July 21, 2011 07:42 sangrampp ANSYS Meshing & Geometry 0 November 17, 2010 07:57 hammam CFX 3 August 6, 2007 10:41 Flavio CFX 2 November 24, 2006 13:01

All times are GMT -4. The time now is 17:29.