when the heat source is removed from a fluid, convection currents in the fluid will

When the heat source is removed from a fluid, the convection currents in the fluid will eventually stop. This happens because the heat that causes the fluid to expand, become less dense, and rise is no longer being supplied. Without the heat source, the temperature differences in the fluid that drive the buoyancy forces and fluid motion decrease. As a result, the fluid gradually becomes more uniform in temperature and density, causing the convection currents to diminish and ultimately cease. In summary, removing the heat source causes convection currents to slow down and stop as the fluid cools and density differences vanish.