Related Experiment Video
Updated: Jan 29, 2026
10:03
Uncoupling Coriolis Force and Rotating Buoyancy Effects on Full-Field Heat Transfer Properties of a Rotating Channel
Published on: October 5, 2018
8.6K
Numerical Study on Heat Transfer Performance of Turbulence Enhancement Configurations for Galinstan Based
Fajing Li1, Junxi Han2, Zhifeng Wang2
1Guangzhou Railway Polytechnic, Guangzhou 511300, China.
Micromachines
|January 28, 2026
Summary
Efficient thermal management is vital for microelectronics. This study shows that while turbulators improve heat transfer in microchannels, expanded regions can hinder performance, increasing temperatures.
Area of Science:
- Thermal Management
- Microfluidics
- Heat Transfer
Background:
- High heat flux and temperatures in microelectronics reduce reliability.
- Efficient thermal management is essential for stable device operation.
- Liquid metal coolants offer potential for advanced thermal solutions.
Purpose of the Study:
- Investigate flow and heat transfer in microchannel heat sinks with Galinstan.
- Evaluate various turbulator configurations for enhanced thermal performance.
- Analyze the impact of expanded regions on heat transfer.
Main Methods:
- Utilized Galinstan liquid metal as the coolant.
- Simulated microchannel heat sinks with diverse turbulator designs.
- Analyzed flow distribution, heat transfer enhancement, and pressure loss.
Main Results:
- Turbulators creating symmetric flow fields improve distribution in expanded microchannels.
- A long teardrop-shaped turbulator offered the best heat transfer enhancement (13.8-25.9%).
- Expanded regions reduced fluid velocity, increasing bottom surface temperature and degrading overall performance.
Conclusions:
- Turbulator design is critical for microchannel heat sink performance.
- Expanded regions, despite turbulators, can negatively impact thermal management.
- Optimizing microchannel geometry and turbulators is key for effective electronic cooling.
Related Concept Videos
02:44Heating and Cooling Curves
27.6K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
27.6K
01:19Mechanism of heat transfer
1.9K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
1.9K
01:14Mechanisms of Heat Transfer I
6.2K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
6.2K
01:20Mechanisms of Heat Transfer II
4.5K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
4.5K
01:14Mechanisms of Heat Transfer
1.7K
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
1.7K
01:20¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
1.7K
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
1.7K