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[GAMBIT] Issue found with Create Boundary Layer (inverted airfoil)

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Old   December 26, 2012, 11:53
Default Issue found with Create Boundary Layer (inverted airfoil)
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susan
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Hello,

I have found an issue while I was meshing an inverted airfoil. When I chose the “Create Boundary Layer” option, the “thickness” of that Boundary Layer was not “uniform”. Would you be so kind as to help me? Thanks in advance.

….

This is what I have obtained:

http://imageshack.us/photo/my-images/338/problem1d.jpg

http://imageshack.us/photo/my-images/202/problemsn.jpg

The two involved faces are:

v_face29={AZ15,144Z15,edge 56,edge 58,edge 60,135Z9,BZ9,v-edge97 (unmeshed)}

w12={edge59,edge52,134Z11,IZ11,IA (unmeshed)}

http://imageshack.us/photo/my-images...w12faceamp.jpg

Face v_face29:

http://imageshack.us/photo/my-images/41/vface29.jpg

“Zoomed” Face v_face:

http://imageshack.us/photo/my-images/10/vface29amp.jpg

Face w12:

http://imageshack.us/photo/my-images/255/w12face.jpg

“Zoomed” face w12:

http://imageshack.us/photo/my-images/405/w12faceamp.jpg


Create Boundary Layer data:

First row a=0.0006 (m)
Growth factor (a/b)=1.0206
Rows=19
Depth= 0.0137819 (m)
Edges{edge.58,edge.60,edge.56,edge.59,edge,52}

http://imageshack.us/photo/my-images...ylayerdata.jpg


Face v_face29's edges data:

AZ15:

http://imageshack.us/photo/my-images/717/az15data.jpg

144Z15:

http://imageshack.us/photo/my-images/17/144z15data.jpg

edge 56:

http://imageshack.us/photo/my-images/18/edge56.jpg

edge 58:

http://imageshack.us/photo/my-images/268/edge58v.jpg

edge 60:

http://imageshack.us/photo/my-images/542/edge60.jpg

135Z9:

http://imageshack.us/photo/my-images...5z9datawen.jpg

BZ9:

http://imageshack.us/photo/my-images/803/bz9data.jpg

v.edge97: Unmeshed


Face W12's edges data:

AZ15: See above (Face v_face29's edges data)

144Z15: See above (Face v_face29's edges data)

edge 59:

http://imageshack.us/photo/my-images/100/edge59data.jpg

edge 52:

http://imageshack.us/photo/my-images/707/edge52data.jpg

134Z11:

http://imageshack.us/photo/my-images/715/134z11data.jpg

IZ11:

http://imageshack.us/photo/my-images/853/iz11data.jpg

IA: Unmesshed

invertedairfoil.zip:

invertedairfoil.dbs
invertedairfoil.jou
invertedairfoil.lok
invertedairfoil.trn

http://www.mediafire.com/?j47asxx57b6mak7

......

Greetings
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Old   January 3, 2013, 02:46
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did you try to attach BL prior meshing anything?
On your first picture we can see an edge (in front of your leading edge) which appears blue (which means meshed)
So your BL has to deal with this meshed edge...
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Old   January 3, 2013, 07:55
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susan
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Hi -mAx-

I did not.

I meshed first the edges and then I attached the BL.

I'll try your advice.

I am very grateful to you for your help.

Regards, Susan.
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