# The size of the computational domain

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 March 19, 2004, 11:42 The size of the computational domain #1 CFD Rookie Guest   Posts: n/a Sponsored Links Hello everyone, I have a quick question here. I am trying to model a full size airplane (half an airplane: cut along the X-Z plane). What is the probable size of my overall computational domain. Should I use the airplane overall fuselage length as my reference or the wing geometric chord (c_bar) as my reference length or something else? In terms of upstream, downstream, lateral side, upper and lower boundary, how far is far enough? Thanks in advance.

 March 19, 2004, 12:36 Re: The size of the computational domain #2 Jarmo Monttinen Guest   Posts: n/a What is your Reynolds number etc? I don't have the fuselage in my computations so I've use the wing max chord and the wing span. Upstream, upper and lower about 5*chord, downstream about 10*chord, the side depends more on the Re, the wing span, etc... I have used about 3*span but have a LAR wing so for a higher AR wing that would be an overkill. I started with a slightly smaller domain and increased to these, further increase did not change the results. I hope this helps. -- Jarmo

 March 21, 2004, 10:23 Re: The size of the computational domain #3 versi Guest   Posts: n/a Supersonic -> upstream BC can be nearer. Subsonic -> upstream 1-2 full plane length Lateral: based on win-span. Anyway, there are lot Refs. for you.

 August 22, 2016, 04:12 Size of computational domain #4 New Member   Pradyuman Join Date: May 2016 Posts: 2 Rep Power: 0 How to calculate the size of computational domain in case of flow past bluff bodies?

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