No matter what you call it, windbreak, heat reflector or fire wall, this simple structure is used to direct heat, protect your fire and minimize wind. Reflectors can be built using rocks, snow, green wood, ice; basically any flat surface will work.
Any fire style can double as a reflector fire, Just place the reflector wall behind the fire at the proper angle and distance to direct heat in the direction you want it.
How it works: The angle of the reflector is usually set at about 70 or 80 degrees vertical. The heat rays from the fire hit the surface of the heat reflector and bounce back at the same reflective angle towards the space you are aiming at.