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Shape of a brick chimney - Forno Bravo Forum: The Wood-Fired Oven Community

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Photo Galleries are back! Instructions below.

Dear forum users,
Thank you for your patience with the Photo galleries. We've got your galleries online!
We have finished writing a custom script to migrate the PhotoPlog to vBulletin5’s albums.

Unfortunately V-Bulletin killed the "Photoplogs" in their software upgrade which was unforeseen and we're the first development group to have written a script for getting the galleries back... that said, it took some time to reverse engineer the code and get the albums to move over seamlessly!

Forum users will be able to access their “PhotoPlog” images through their user profile page by clicking on the “Media” tab.
They will also be able to browse other albums by going to the albums page. (On the forum site, there is a link in the black bar beside “Forums” to the albums.)

In order for users to create an album please follow the steps below.
1) Go to user profile page and click “Media”
2) Click Add Photos
3) Enter Photo Gallery Title in the first field
4) Click Upload or Select from Photo Album to add photos
5) Click Post
6) Once posted, the album will be created as a “Topic” on the albums page for the public to see. The topic title will be the “Photo Gallery Title” they created before uploading their photos.


To create this migration path we used vBulletin5’s default album structure. Unfortunately, it won’t work like the “PhotoPlog” but is an album/gallery component on the forum now.
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Shape of a brick chimney

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  • Shape of a brick chimney

    I am at the final stages of my oven build. I have now started with my chimney which is a simple brick chimney that sits on top of the front arch.
    See picture.

    So far the chimney is about 30cm high and it was recommended to me (from a non oven builder ph..) to make the top of the chimney narrower towards the end to increase the “upwards draft”.

    Is that true?

    Also, the inside of the chimney is very rough due to different sized bricks and my lack of brick laying skills. Does the rough surface have a negative effect on draft ability of the chimney? Is it worth rendering the inside of the chimney with fire mortar?

    Any thoughts are very much appreciated
    Attached Files

  • #2
    Re: Shape of a brick chimney

    Also, the inside of the chimney is very rough due to different sized bricks and my lack of brick laying skills. Does the rough surface have a negative effect on draft ability of the chimney? Is it worth rendering the inside of the chimney with fire mortar?
    I don't think it's worth messing with the inside of the chimney. The folks who build masonry heaters have largely concluded that a smooth transition isn't worth cutting a bunch of bricks. On the other hand, the rumford fireplace folks think a smooth curve is essential. It's a matter of opinion: mine is that smoke is a gas and will flow where it flows despite mini-turbulence caused by roughness in your smoke funnel.
    My geodesic oven project: part 1, part 2

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    • #3
      Re: Shape of a brick chimney

      @DMUN.

      Kudos for the excellent quality of your work and the documentation to help put it out there for the rest of us to learn from and enjoy. I especially enjoyed the geodesic dome and your comments about it. I was thinking of trying that, but have decided to go conventional. Of all the things you have posted, this comment on smoke flow in a smooth vs rough chimney is the only one I might offer a second perspective on.

      People who design pipes and airplanes spend a lot of time reducing the rough edges because this can have a surprising effect on the flow of fluids (gas and liquid). It will never be as important as having the proper size, but could make the difference between 'almost big enough' and 'big enough'.

      bd

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