The sous vide is to cook it internally to perfection. The smokling is to provide the crust and external treatment. Your smoke does not penetrate the meat -- that "smoke ring" has nothing to do with smoke and is a chemical reaction. You should get a smoke ring with sous vide brisket cooked later in a smoker because they will be super moist coming out of the sous vide bag.
What are smoke rings and what causes them to form on meat? Get the science behind this culinary phenomenon and learn how to create the perfect smoke ring.
memphisgrills.com
We talk about how barbecue meat develops a smoke ring and why it isn’t necessarily an indicator of good barbecue. Click through to learn more.
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Smoke rings are basically aesthetic.