Solution tips.
what will the boundary(both side insulated) nodes equations be? please I need help in any way possible
1 回表示 (過去 30 日間)
古いコメントを表示
The general energy balanced equation is given in the attach image
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/171129/image.jpeg)
for all interior nodes of the glass cover discretized equation:
For i=2, 3, 4… Nx-1
j=4
attach as image.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/171130/image.jpeg)
how would the finite difference equation at i=1 and i=N for glass i.e. at j=4 look like? the complete control volume diagram is attached.
0 件のコメント
採用された回答
Abraham Boayue
2018 年 3 月 11 日
6 件のコメント
John D'Errico
2018 年 3 月 12 日
編集済み: John D'Errico
2018 年 3 月 12 日
The spam flag rules are not well explained that I know of, probably because they don't want spammers to know how to get around their filters. I can understand that. Honestly, I rarely see responses mis-flagged as spam, so I would not worry too much. When it happens, one of us will wander through, and remove such misplaced flags anyway. For posts that really are clearly spam, I will notify the site admin, and they will typically delete the offending account. The site has been pretty good though, with little true spam getting through, so they have things well in hand.
その他の回答 (1 件)
Torsten
2018 年 3 月 13 日
Your equation is a first-order PDE with only a convection, but no conduction term in it. Thus you cannot prescribe insulated boundaries. The only applicable conditions for this kind of equation are Dirichlet and extrapolation boundary conditions.
Furthermore, to discretize the spatial derivative term dT/dx, never use centered differences schemes, but only upwind schemes.
Best wishes
Torsten.
0 件のコメント
参考
カテゴリ
Help Center および File Exchange で Boundary Conditions についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!