MESH PANEL MODEL IMPORT (MOSES)

Hi,

I am trying to convert an AQWA mesh to MOSES. Appreciate if you can advise why the result for buoyancy seem to be negative? and what need to be corrected? Thanks

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  • Hi Naim, 

    This is probably due to the incorrect panel orientation. The MOSES convention states that when defining a panel, the order of vertices should be clockwise when the panel is viewed from the outside of the body. I believe that when you converted from AQWA mesh to MOSES, it was in the opposite direction to the MOSES convention.

    You can simply change the direction by using the "REVERSE -yes" command just before the panel definition, as shown in the code below. I hope this helps.

    $****************************************
    $
    &describe piece %vname% -tanaka 0 -diftype 3ddif %win_cur
    $
    $****************************************
    $
    REVERSE -YES
    PANEL	*N407	*N406	*N64	
    PANEL	*N206	*N417	*N19	
    PANEL	*N65	*N66	*N409	*N408
    PANEL	*N66	*N67	*N410	*N409
    PANEL	*N67	*N68	*N411	*N410
    PANEL	*N68	*N69	*N412	*N411
    PANEL	*N69	*N70	*N413	*N412
    PANEL	*N70	*N71	*N414	*N413
    PANEL	*N71	*N72	*N416	*N414
    PANEL	*N417	*N416	*N423	*N418
    PANEL	*N416	*N72	*N73	*N423
    PANEL	*N423	*N403	*N419	*N418
    PANEL	*N423	*N73	*N74	*N403

    Answer Verified By: Naim Hassan 

Reply
  • Hi Naim, 

    This is probably due to the incorrect panel orientation. The MOSES convention states that when defining a panel, the order of vertices should be clockwise when the panel is viewed from the outside of the body. I believe that when you converted from AQWA mesh to MOSES, it was in the opposite direction to the MOSES convention.

    You can simply change the direction by using the "REVERSE -yes" command just before the panel definition, as shown in the code below. I hope this helps.

    $****************************************
    $
    &describe piece %vname% -tanaka 0 -diftype 3ddif %win_cur
    $
    $****************************************
    $
    REVERSE -YES
    PANEL	*N407	*N406	*N64	
    PANEL	*N206	*N417	*N19	
    PANEL	*N65	*N66	*N409	*N408
    PANEL	*N66	*N67	*N410	*N409
    PANEL	*N67	*N68	*N411	*N410
    PANEL	*N68	*N69	*N412	*N411
    PANEL	*N69	*N70	*N413	*N412
    PANEL	*N70	*N71	*N414	*N413
    PANEL	*N71	*N72	*N416	*N414
    PANEL	*N417	*N416	*N423	*N418
    PANEL	*N416	*N72	*N73	*N423
    PANEL	*N423	*N403	*N419	*N418
    PANEL	*N423	*N73	*N74	*N403

    Answer Verified By: Naim Hassan 

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