Flow and boiling in microchannel:
Prof. Singh is one of the first researchers in the country to develop microchannels on silicon.
He undertook flow boiling experiments in a microchannel, involving relatively high temperature and pressure,
a capability that very few possess worldwide to date.
Experiments were conducted in single/multiple microchannels of hydraulic diameter 45-140 micrometer, and
aligned microheaters were fabricated on the reverse side of the silicon wafer to provide well controlled and metered input power.
Detailed measurements of instantaneous and average pressure drop temperature, heat transfer coefficient void fraction, and
critical heat flux, along with flow visualization using high-speed camera were undertaken and
flow regime map was obtained for the first time in such a system .
Further,he demonstrated the cooling of an integrated electronic device dissipating very high heat flux (250 W/cm2) under transient condition.
He also developed and patented a strategy to locate and mitigate hot-spot in electronic devices.
The study has been extended to the microchannel.
Constant-Wall-Temperature Microdevice is another important innovation as maintaining a constant temperature is extremely challenging.
In a first of its kind approach, Prof Singh has been able to successfully maintain desired temperatures within ±1 °C,
thereby imparting great practical significance to this research .
This breakthrough is useful for making a microscale-PCR.
The microdevice and fundamental aspects of this work are being referred by several esteemed researchers across the globe.
