[Gmsh] Converting quadratic mesh to linear

[Aman Saxena]

I have attached a quadratic mesh(lines are given by polynomial of degree 4)
with this mail, taken from ::

http://www.as.dlr.de/hiocfd/btc0/index.html

I want to convert this to a refined linear mesh. I have attached "demo.pdf"
to demonstrate as what I mean by converting quadratic mesh(degree 2 in this
case) to a refined linear mesh. Is it possible to do it in GMSH?

Thanks

 btc0-NLR-L3.v2.m4.msh.gz
<https://drive.google.com/file/d/1lUL_FqGF0EosFv5E95xUF764MVD6Ue3Y/view?usp=drive_web>
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