> Hi,I have a few questions about some false physical boundaries which are > plotted when using cgins. > > To begin, i am mapping a flatback airfoil. Essentially it is an airfoil > with the trailing edge chopped off. This in itself proved difficult to grid > given my limited knowledge of ogen mappings and ogens seemingly limited > ability to map around sharp corners. None the less i was able to get a very > sharp flat trailing edge using shared sides, mixed boundaries, and no hole > cutting. Ogen indicates my mappings overlap properly. But, when i read in > this grid file to cgins the mixed boundary that i specified is still plotted > as a physical boundary. To be clear i can tell by the flow field that these > "false" physical boundaries are not actually recognized by cgins. They do > however look strange and raise questions to their origin and significance. I > have found that by disabling boundary plotting completely whilst in cgins > gets rid them but it also gets rid of the airfoil boundary. This make its > harder to see where the airfoil stops and the flow field begins. > > My question is, is there a way to change the representation of these mixed > boundary boundaries in ogen to prevent them from showing up when running a > simulation? > I have attached a screen shot to show what i mean. Unfortunately the email > client i am using (Gmail) will not let me send .cmd files (for fear of > malware i suppose) so i can not send my ogen and cgins command files. > > I would appreciate any insight you can provide on this issue. > > Thanks! > Matt >
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