An assembly for a compartment of a gas turbine engine , the assembly comprising: a housing defining a portion of the compartment ; a gear disposed within the compartment and connected to a rotary shaft ; and a baffle disposed about the gear , the baffle comprising: an upstream portion disposed on an upstream side of the gear , the upstream portion comprising: an upstream outer wall separated from the gear ; and an upstream inner wall positioned between the upstream outer wall and the gear , the upstream inner wall and the upstream outer wall of the upstream portion forming an upstream flow channel therebetween; and a downstream portion disposed on a downstream side of the gear opposite from the upstream portion , the downstream portion connected to the upstream portion and comprising: a downstream outer wall separated from the gear ; and a downstream inner wall positioned between the downstream outer wall and the gear , the downstream outer wall and the downstream inner wall of the downstream portion forming a downstream flow channel therebetween. a housing defining a portion of the compartment ; a gear disposed within the compartment and connected to a rotary shaft ; and a baffle disposed about the gear , the baffle comprising: an upstream portion disposed on an upstream side of the gear , the upstream portion comprising: an upstream outer wall separated from the gear ; and an upstream inner wall positioned between the upstream outer wall and the gear , the upstream inner wall and the upstream outer wall of the upstream portion forming an upstream flow channel therebetween; and a downstream portion disposed on a downstream side of the gear opposite from the upstream portion , the downstream portion connected to the upstream portion and comprising: a downstream outer wall separated from the gear ; and a downstream inner wall positioned between the downstream outer wall and the gear , the downstream outer wall and the downstream inner wall of the downstream portion forming a downstream flow channel therebetween. an upstream portion disposed on an upstream side of the gear , the upstream portion comprising: an upstream outer wall separated from the gear ; and an upstream inner wall positioned between the upstream outer wall and the gear , the upstream inner wall and the upstream outer wall of the upstream portion forming an upstream flow channel therebetween; and an upstream outer wall separated from the gear ; and an upstream inner wall positioned between the upstream outer wall and the gear , the upstream inner wall and the upstream outer wall of the upstream portion forming an upstream flow channel therebetween; and a downstream portion disposed on a downstream side of the gear opposite from the upstream portion , the downstream portion connected to the upstream portion and comprising: a downstream outer wall separated from the gear ; and a downstream inner wall positioned between the downstream outer wall and the gear , the downstream outer wall and the downstream inner wall of the downstream portion forming a downstream flow channel therebetween. a downstream outer wall separated from the gear ; and a downstream inner wall positioned between the downstream outer wall and the gear , the downstream outer wall and the downstream inner wall of the downstream portion forming a downstream flow channel therebetween. <EOS>