Heat transfer mechanisms in heat pipes using nanofluids - A review

- Authors have summarized research outcomes of recent experimental and numerical studies.
- Provide an overview of heat transfer mechanism in heat pipes with nanofluids.
- Identified the most accepted heat transfer mechanisms.
- Research gap has been identified and suggested direction for future work.

Heat pipes are compact and efficient heat exchangers which are widely used in a large number of thermal devices. Researchers were attracted towards the application of nanofluids in heat pipes due to its superior thermo physical properties. They used nanofluids as working fluid in heat pipes and noticed significant changes in thermal performance. In present study authors summarize the research outcomes of various experimental and numerical studies. It also provides an overview of heat transfer mechanisms responsible for the change in thermal performance of heat pipes. Heat transfer mechanisms depend upon, type of heat pipes, nanofluids characteristics, design and operating parameters of heat pipes, etc. All the parameters have their own individual as well as the combined effect on thermal performance. Authors have drawn the attention of research community to explore the dependency of all parameters on each other.