A few years back I built a brick BBQ just beyond the end of my patio. The idea in positioning it was to be able to look down the garden when cooking, but also be able to talk to friends on the patio. Strictly speaking it’s an Australian style BBQ, so I guess I should call it a barbie
It has a brick built base, so I spent some time thinking about where to site it as its not exactly moveable. I think I got it right, except there’s a snag. Whenever I use it I get a face full of smoke. I initially thought it was just the wind blowing the smoke in my direction, but I now realize that’s not the problem. If I stand at the side I also get a face full of smoke, or even at the back. If I step away the smoke swirls around if there’s any breeze, but otherwise it basically goes straight upwards.
I strongly suspect that the Coandã effect is causing the plume get deflected in my direction, and once it sticks to me that’s it. I guess the same problem applies to most BBQs that are not sited against a wall, or better still in a corner.
Well I’m not going to move it! I need to find another solution. I’m torn between making a metal back plate for it and see if that fixes the problem, and attempting to simulate it. Simulating it I can convince myself it IS the Coandã effect, find out if a back plate that will fix the problem or if the thing will need a chimney. If I try using a back plate it will either work or it won’t but if it doesn’t work I won’t be any closer to knowing why, or what to do about it, like use a bigger back plate.
I guess I’m going to have to simulate it at some point…