# HELP: VMERG

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 July 29, 2005, 12:45 HELP: VMERG #1 sunlight Guest   Posts: n/a Hello, i am fighting since days: i have a transient case and the mesh changes with times. i have used blocks to create the mesh and vmerg is required for the baffles. I MUST keep the number of vertices constant and this does not happen, i tried "nodelete" in vmerg but then the baffles are ignored. I have kept the tolerance of 1e-6 because the smallest cells are around PLease Help. Thank you

 July 29, 2005, 12:59 Re: HELP: VMERG #2 William Blake Guest   Posts: n/a "vmerg is required for the baffles" Why is vmerge required for baffles? I dont see any reason for this statement. Just create your mesh to get a 1 by 1 connectivity and once this is done and the mesh passes all the checks add the baffles.

 July 29, 2005, 13:15 Re: HELP: VMERG #3 sunlight Guest   Posts: n/a Vmerg is needed because i have several neighbouring blocks with face-face. if i dont use vmerg: warning occurs: baffle # is only on one face, ignored for calculation hope i made myself clear i MUST have same number of vertices for changing mesh.

 July 29, 2005, 14:17 Re: HELP: VMERG #4 William Blake Guest   Posts: n/a you should first do the vmerge and later create the baffles ...

 August 1, 2005, 05:58 Re: HELP: VMERG #5 sunlight Guest   Posts: n/a it does not work. my steps are: 1) delete past cells 2) change position of particular vertices 3) create cells through block commands, here i use variable scale factors due to mesh-fineness requirement which is time-dependent I do not create baffles at this time 4) vmerg with differing tolerance and delete ON 5) number of vertices is not the same anymore I must have same number of vertices PLEASE HELP

 August 1, 2005, 06:50 Re: HELP: VMERG #6 William Blake Guest   Posts: n/a It doesn't work this way. You can move the vertex positions between the time steps, add or remove layers ... but not just create a mesh with different vertex numbers. Read this (and also the other articles on this site) to get an idea what to do: http://www.adapco-online.com/adapco_...rts/star4.html

 August 4, 2005, 13:54 Re: HELP: VMERG #7 sunlight Guest   Posts: n/a Thanks William BUT 0) i have read the articles. it will not help so much in case (no event) 1) i do not create vertices at different timesteps rather must keep them same. 2) i have the tolerance for vmerg 10e-14 so no vertices are delected and tring out if this will work.

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