The embodiments described herein relate to generating fluid flow. A pump is positioned adjacent to a heat source. The pump includes a primary chamber having a primary rotational element configured to rotate on an axis, and a secondary chamber having a secondary rotational element configured to rotate on the axis, with a heat transfer element positioned between the primary chamber and the secondary chamber. The primary rotational element is coupled with the secondary rotational element along the axis. A primary fluid is received in the primary chamber with a primary fluid flow, which rotates the primary rotational element. A secondary fluid flow is generated in the secondary chamber by the primary rotational element causing a rotation of the secondary rotational element on the axis.