[ANSYS Meshing] problem with mesh quality

yaseen wsu · April 18, 2016, 10:25

hello everyone
I simulate free surface flow my geometry complex, so I divided into eight parts. sweap method used in ANSYS meshing for swepable bodies and tetrahedron and multizone method for others, but the problem is skewness which is 0.966 (max), I tried by sizing but I can not reduced it. Who can suggest me to improve my mesh quality.
thanks

Kapi · April 18, 2016, 18:44

sizing is the best way to reduce your skewness and improve quality.
Please post your mesh where you are getting high skewness.
You can use behavior "HARD" in sizing

yaseen wsu · April 19, 2016, 07:16

thanks for your reply
my geometry is complex, some parts finer than others, what due you mean by(HARD) in sizing?
the follow is my meshing model, thanks for your suggestion, max. value of skewness in the tetrahedron part
http://www.cfd-online.com/Forums/att...1&d=1461063279
http://www.cfd-online.com/Forums/att...1&d=1461063297
http://www.cfd-online.com/Forums/att...1&d=1461063316

https://drive.google.com/open?id=0B3...GtsazRUbUVMYkk

vasava · April 28, 2016, 08:22

When you use sizing in Ansys Meshing, the 'behavior' can be 'Hard' or 'Soft'. By selecting soft, you are allowing Ansys meshing to over-ride the sizing, because it thinks that it can give you better mesh by NOT obeying the sizing you input.

Do post pictures of the mesh and model.

yaseen wsu · April 28, 2016, 15:23

Kapi · April 29, 2016, 02:16

use lower size elements where you need fine mesh and make sure you use behavior "Hard"

I strongly suggest to refer to Help section, read it thru
if you dont get your answer then search for similar threads on this forum
and even after this if you dont get your answer then only post a question!!

I am sure you will get help from help section.

April 18, 2016, 10:25	problem with mesh quality	#1
yaseen wsu Senior Member yaseen Join Date: Oct 2015 Location: Hawler Posts: 174 Rep Power: 10	hello everyone I simulate free surface flow my geometry complex, so I divided into eight parts. sweap method used in ANSYS meshing for swepable bodies and tetrahedron and multizone method for others, but the problem is skewness which is 0.966 (max), I tried by sizing but I can not reduced it. Who can suggest me to improve my mesh quality. thanks

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April 18, 2016, 18:44		#2
Kapi Senior Member Join Date: Apr 2014 Location: Melbourne Posts: 584 Rep Power: 14	sizing is the best way to reduce your skewness and improve quality. Please post your mesh where you are getting high skewness. You can use behavior "HARD" in sizing

April 19, 2016, 07:16		#3
yaseen wsu Senior Member yaseen Join Date: Oct 2015 Location: Hawler Posts: 174 Rep Power: 10	thanks for your reply my geometry is complex, some parts finer than others, what due you mean by(HARD) in sizing? the follow is my meshing model, thanks for your suggestion, max. value of skewness in the tetrahedron part http://www.cfd-online.com/Forums/att...1&d=1461063279 http://www.cfd-online.com/Forums/att...1&d=1461063297 http://www.cfd-online.com/Forums/att...1&d=1461063316 https://drive.google.com/open?id=0B3...GtsazRUbUVMYkk

April 28, 2016, 08:22		#4
vasava Senior Member Paritosh Vasava Join Date: Oct 2012 Location: Lappeenranta, Finland Posts: 732 Rep Power: 22	When you use sizing in Ansys Meshing, the 'behavior' can be 'Hard' or 'Soft'. By selecting soft, you are allowing Ansys meshing to over-ride the sizing, because it thinks that it can give you better mesh by NOT obeying the sizing you input. Do post pictures of the mesh and model.

April 28, 2016, 15:23		#5
yaseen wsu Senior Member yaseen Join Date: Oct 2015 Location: Hawler Posts: 174 Rep Power: 10	thanks for your reply, the following images are my model mesh http://www.cfd-online.com/Forums/att...1&d=1461871206 http://www.cfd-online.com/Forums/att...1&d=1461871217 http://www.cfd-online.com/Forums/att...1&d=1461871230 http://www.cfd-online.com/Forums/att...1&d=1461871247 http://www.cfd-online.com/Forums/att...1&d=1461871260 http://www.cfd-online.com/Forums/att...1&d=1461871206 http://www.cfd-online.com/Forums/att...1&d=1461871217 http://www.cfd-online.com/Forums/att...1&d=1461871230 http://www.cfd-online.com/Forums/att...1&d=1461871247 http://www.cfd-online.com/Forums/att...1&d=1461871260

April 29, 2016, 02:16		#6
Kapi Senior Member Join Date: Apr 2014 Location: Melbourne Posts: 584 Rep Power: 14	use lower size elements where you need fine mesh and make sure you use behavior "Hard" I strongly suggest to refer to Help section, read it thru if you dont get your answer then search for similar threads on this forum and even after this if you dont get your answer then only post a question!! I am sure you will get help from help section.