Does convection occur when there is no gravity?

Absolutely, convection can occur in the absence of gravity. Convection in general and “natural convection” are two different things. Convection is a mode of heat transfer that involves bulk fluid motion. read more

Yes, there is no convection in zero gravity environments. Also, practically speaking there is no convection in vacuum (space) environments. Cooling of electronic equipment is space is difficult. Convection does not work either in the absence of air or gravity. read more

Because gravity is necessary for density differences to arise, neither buoyancy nor convection occur in a zero-gravity environment such as space. Consequently, the combustion products accumulate around the flame, preventing sufficient oxygen from reaching it and sustaining the combustion reaction. Ultimately the flame goes out. read more

There are a variety of circumstances in which the forces required for natural and forced convection arise, leading to different types of convection, described below. In broad terms, convection arises because of body forces acting within the fluid, such as gravity. read more