Never tried it, but from what I've read and heard, if you just sprinkle dry yeast in there it will just sink to the bottom, dead. Too much alcohol already present for it to do anything. You could try to get it going in a starter and pitch the whole starter into the Bw at high krausen. Another option is to rack the BW onto a fresh yeast cake from a separate healthy fermentation. I have done this once and was able to get a few more points off of an ipa with a similar og of your BW. Or add some sugar (table is fine), added to a little boiling water to sanitize and make an easy-to-pour syrup. I would probably try that first. Of course your abv will go up, but no bad news there!
But all of these are band aids to what was probably too high a mash temp. With enough grain for a 1.082, you'll get plenty of body even at lower mash temps.
Or none of the above and just call it done. Maybe once it's carbed up it will be fantastic!