Ferrofluid Direct Liquid Cooling With Vortex-Driven Heat Transfer

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Solution Overview

Problem

Existing direct liquid cooling (DLC) systems face challenges with reduced coolant liquid flow rates due to impedances, branching, couplers, and boundary layer effects, leading to insufficient cooling of high-heat generating components.

Innovation Solution

Incorporating a coolant liquid flow motor with ferromagnetic particles and an alternating current-driven coil system to induce a vortex in the coolant liquid flow, enhancing turbulence and increasing local velocity at the inner perimeter of the tubing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If coolant liquid flow rate is increased to improve cooling efficiency, then heat transfer improves, but system impedance and boundary layer effects reduce the effectiveness

Engineering Contradiction:

Improvecooling efficiencyVSAvoidflow rate effectiveness

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies mechanical vibration through a flow motor that generates rotational motion to agitate the coolant liquid. This vibration/turbulence mechanism disrupts boundary layers and enhances mixing, allowing effective heat transfer at lower flow rates by improving the convective heat transfer coefficient.

Inventive Principle:

Principle #18Mechanical vibration

Solution Approach 2:

The patent changes the flow regime parameter from laminar to turbulent flow by introducing rotational agitation. This parameter change increases the heat transfer coefficient significantly, compensating for flow rate reductions caused by system impedance and branching.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If turbulence is increased to improve convective heat transfer, then heat transfer efficiency improves, but energy consumption increases

Engineering Contradiction:

Improveheat transfer efficiencyVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The flow motor generates controlled turbulence through rotational motion, creating eddies and mixing that enhance convective heat transfer. This targeted vibration approach achieves high heat transfer coefficients with minimal energy input compared to simply increasing flow rate.

Inventive Principle:

Principle #18Mechanical vibration

Solution Approach 2:

The patent counteracts the negative effects of system impedance and boundary layer resistance by introducing localized turbulence. This creates a counterbalancing effect where enhanced local mixing compensates for flow rate reductions, maintaining heat transfer efficiency without proportional energy increases.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

3Device complexity

If flow rate is reduced due to system impedance and branching, then system complexity decreases, but cooling effectiveness deteriorates

Engineering Contradiction:

Improvesystem simplicityVSAvoidcooling effectiveness

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent applies localized turbulence generation at specific points in the cooling system rather than uniformly increasing flow throughout. This local quality enhancement allows the system to maintain cooling effectiveness in critical areas despite overall flow rate reductions from impedance and branching.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

By introducing mechanical vibration/turbulence at strategic locations, the system compensates for flow rate reductions caused by impedance and branching. The vibration enhances local heat transfer coefficients, maintaining cooling effectiveness without requiring increased overall flow rates.

Inventive Principle:

Principle #18Mechanical vibration

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

The vortex-induced turbulence significantly improves convective heat transfer efficiency by maintaining constant overall flow rates while increasing local velocity, effectively addressing cooling inefficiencies in DLC systems.

Implementation Method 1

an alternating current-driven coil system to induce a vortex in the coolant liquid flow

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

The liquid coolant may include ferromagnetic particles

Methodology Applied

Scientific EffectFerrofluid: Ferrofluid

Implementation Method 3

The vortex-induced turbulence significantly improves convective heat transfer efficiency

Methodology Applied

Scientific EffectConvection: Convection

Implementation Method 4

enhancing turbulence and increasing local velocity at the inner perimeter of the tubing

Methodology Applied

Scientific EffectTurbulence: Turbulence

Data Source

PatentUS20260068086A1Electrically improve convective heat transfer using ferrofluid in a direct liquid cooling system

Publication Date: 2026.03.05 DELL PROD LP

AI summary

A liquid cooling system includes a tube and a coolant liquid flow motor. The tube carries a liquid coolant. The liquid coolant includes ferromagnetic particles. The coolant liquid flow motor is provided around a perimeter of the tube, and induces a vortex in a flow of the liquid coolant.