He used them for work on problems of heat flow.

She felt a rush of heat flow through her body.

He felt heat flow through him, and his mind relaxed.

If there is no heat flow, then work cannot be accomplished.

This large heat flow into the wall has a further consequence.

In other words: the heat flow is completely converted into power.

In cold conditions, the main aim is to reduce heat flow out of the building.

The production of steam allows a high heat flow in a small space.

What we perceive as hot or cold is not the temperature but the heat flow to and from our skin.

In any material but iron, it made heat flow together toward the center of its projected field.