Mesh consistency check failed for merged 2D meshes
Hi, I have problems with merging two 2D meshes. I want to merge two meshes generated with genbox: 1. walls.box This mesh is an "Y"-type mesh. It goes from beeing a square of side 10 into a square of side 0.5 via two circles (of radii 1.1 and 1.0). 2. center.box This is an "Box"-type mesh. It is a square of size %%%%%%%%%%%%%%%%%%%%%%%% This is walls.box: reafile.rea 2 1 # Y 4 -8 0. 0. bbccb 0.5 0.6 1. 1.1 10. 0 1 1 W ,W ,E ,E , %%%%%%%%%%%%%%%%% And this is center.box: reafile.rea 2 1 # Box -2 -2 -0.5 0.5 1. -0.5 0.5 1. W ,W ,W ,W , %%%%%%% I can plot the two meshes on top of each other, and the elements seem to align perfectly. I use nekmerge2 (from the example case "expansion") to generate a merged .rea file: nekmerge2 center walls bottom I now obtain a bottom.rea file. I generate bottom.map using genmap (tolerance 0.2). I compile (using a bottom.usr file and a SIZE file) using makenek. I run serially using "nek". Now I get several warnings of the type: WARNING2 Element mesh mismatch at: I,J,K,IE: 1 2 1 1 Near Y = -0.50000000 -0.41269471 0.0000000 , d: 0.0000000 -0.36629354E-01 2.0000000 And then "Mesh consistency check failed. EXITING in VRDSMSH." No output is generated. What is the problem here? Have I missed some critical aspect of merging meshes? Best, Johan
Hi Johan, I found that I could merge these with pretex (the text-based version of prenek), which is what I normally use. Here is a little script that also seems to work, given the outputs of genbox on your two files. I call the script "merge2d" and invoke it as: merge2d casea caseb casec to merge casea.rea with caseb.rea and yield casec.rea ln $1.rea tmp_mg1.rea; ln $2.rea tmp_mg2.rea; pretex << EOF tmp_mg3 1 READ PREVIOUS PARAMETERS tmp_mg1 1 BUILD FROM FILE tmp_mg1 10 IMPORT MESH tmp_mg2 n 1 END ELEMENTS 1 ACCEPT MATL,QVOL 1 ACCEPT B.C.'s 1 ACCEPT B.C.'s 1 EXIT EOF mv tmp_mg3.rea $3.rea rm -f *.dra tmp* Paul ________________________________ From: [email protected] [[email protected]] on behalf of [email protected] [[email protected]] Sent: Tuesday, October 25, 2016 3:18 AM To: [email protected] Subject: [Nek5000-users] Mesh consistency check failed for merged 2D meshes Hi, I have problems with merging two 2D meshes. I want to merge two meshes generated with genbox: 1. walls.box This mesh is an "Y"-type mesh. It goes from beeing a square of side 10 into a square of side 0.5 via two circles (of radii 1.1 and 1.0). 2. center.box This is an "Box"-type mesh. It is a square of size %%%%%%%%%%%%%%%%%%%%%%%% This is walls.box: reafile.rea 2 1 # Y 4 -8 0. 0. bbccb 0.5 0.6 1. 1.1 10. 0 1 1 W ,W ,E ,E , %%%%%%%%%%%%%%%%% And this is center.box: reafile.rea 2 1 # Box -2 -2 -0.5 0.5 1. -0.5 0.5 1. W ,W ,W ,W , %%%%%%% I can plot the two meshes on top of each other, and the elements seem to align perfectly. I use nekmerge2 (from the example case "expansion") to generate a merged .rea file: nekmerge2 center walls bottom I now obtain a bottom.rea file. I generate bottom.map using genmap (tolerance 0.2). I compile (using a bottom.usr file and a SIZE file) using makenek. I run serially using "nek". Now I get several warnings of the type: WARNING2 Element mesh mismatch at: I,J,K,IE: 1 2 1 1 Near Y = -0.50000000 -0.41269471 0.0000000 , d: 0.0000000 -0.36629354E-01 2.0000000 And then "Mesh consistency check failed. EXITING in VRDSMSH." No output is generated. What is the problem here? Have I missed some critical aspect of merging meshes? Best, Johan
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