Electrohydrodynamic Heat Sink Using Ion Wind for Microscale Cooling
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Solution Overview
Problem
Conventional heat sinks with fin arrangements are bulky and inefficient for microscale components, leading to integration issues and thermal management challenges in electronics, as they increase the size of the cooling equipment and suffer from boundary layer effects and heat transfer issues.
Innovation Solution
A microscale electrohydrodynamic (EHD) heat sink that uses a base electrode with a converging cavity and a corona electrode connected to an electric power source to ionize a dielectric fluid, generating an ion wind and laminar current for heat dissipation without the need for fins, integrating heat generation and dissipation in a single device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heat sinks with fin arrangements are used, then heat dissipation function is provided, but the size of the heat dissipation element increases
Solution Approach 1:
The invention merges the heat dissipation function and the fluid generation function into a single integrated device. The base electrode serves both as a heat dissipation element and as part of the fluid generation system, eliminating the need for separate fin arrangements and reducing overall device size while maintaining effective heat dissipation through the integrated structure
Solution Approach 2:
The invention replaces the mechanical fin-based heat dissipation system with an electrohydrodynamic system. Instead of relying on extended surfaces (fins) to increase heat transfer area, the system uses electric fields to generate ionic winds that enhance convective heat transfer, substituting mechanical structural solutions with electrodynamic mechanisms
2Temperature
If conventional heat sinks with fin arrangements are used, then heat dissipation is achieved, but integration with microscale components becomes difficult
Solution Approach 1:
The invention combines multiple functions into unified components: the base electrode serves as both heat dissipation element and structural support, while the cavity houses both the fluid medium and the corona electrode. This integration reduces the number of separate components and simplifies assembly with microscale electronic components
Solution Approach 2:
The base electrode performs multiple functions simultaneously: it dissipates heat from the component, contains the dielectric fluid within its cavity, provides structural support for the corona electrode, and acts as one of the two electrodes necessary for generating the ionic wind. This multi-functionality reduces integration complexity
3Temperature
If conventional heat sinks with fin arrangements are used, then heat dissipation function is provided, but boundary layer effects and heat transfer issues occur
Solution Approach 1:
The invention replaces passive fin-based heat dissipation with active electrohydrodynamic fluid generation. The ionic winds generated by the corona discharge actively disrupt thermal boundary layers and enhance convective heat transfer, overcoming the limitations of natural convection that plague fin-based systems
Solution Approach 2:
The invention changes the fundamental mechanism of heat transfer from passive conduction and natural convection (in fin systems) to forced convection driven by ionic winds. By introducing electric fields and ionic motion, the system fundamentally alters the heat transfer parameters and mechanisms to eliminate boundary layer limitations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances heat transfer efficiency and reduces the size of the heat dissipation element, improving integration with microscale components by leveraging the corona effect to generate a directed ion wind for effective cooling, while avoiding the size and mechanical issues associated with traditional fin-based heat sinks.
Implementation Method 1
a corona electrode which is arranged in the cavity of the base electrode, the corona electrode being connected to an electric power source in order to ionise the fluid of the base electrode and generate an ion wind from the corona electrode to the base electrode
Implementation Method 2
generate an ion wind from the corona electrode to the base electrode, so as to generate a laminar current of the fluid in order to discharge the heat from the cavity
Implementation Method 3
a base electrode receiving heat from a heat source to be dissipated
Data Source
AI summary
An electrohydrodynamic heat sink is provided which has a base electrode receiving heat from a heat source to be dissipated, the base electrode having a shape that converges with a cavity wherein a fluid is placed during use, and a corona electrode which is arranged in the cavity of the base electrode, the corona electrode being connected to an electric power source (P.S) in order to ionise the fluid of the base electrode and generate an ion wind (w) from the corona electrode to the base electrode, so as to generate a laminar current of the fluid in order to discharge the heat from the cavity.