Patent ID: 8128399

Claim:
A heater enclosure, comprising: a pair of opposing sidewalls, each sidewall having a substantially planar internal surface; a pair of opposing end walls, each opposing end wall being substantially perpendicular to each opposing sidewall and having a substantially planar internal surface; an opposing top wall and bottom wall, the top wall being substantially perpendicular to each opposing sidewall and to each opposing end wall and having a substantially planar internal surface, the bottom wall being substantially perpendicular to each opposing sidewall and to each opposing end wall and having a substantially planar internal surface, wherein the internal surfaces of each wall collectively form a cavity therein; one or more nozzles coupled to one or more walls, the nozzles introducing a fluid flow into the cavity and adjacently along the internal surface of at least one of the walls in a single direction; and one or more structures extending inwardly from the internal surface of the wall that is adjacent to the fluid flow, the structures maintaining the fluid flow substantially adjacent along the internal surface of the wall that is adjacent to the fluid flow, and wherein the fluid flow is maintained substantially adjacent along the internal surface of one or more walls during operation of the heater enclosure, wherein the structure comprises at least one dimple, and wherein the surface of one or more dimples is entirely formed with a constant radius.