UK HQ Your time

CFD Enclosure Thermal Design

Thermal simulation for LED lighting, LiDAR, automotive ECU, aerospace avionics, telecom, and industrial electronics enclosures. Predict component temperatures, optimise heat sinks, and validate cooling strategies before prototype fabrication.

CFD Enclosure Thermal Design for Electronics & Optoelectronics

Every electronic enclosure is a thermal management challenge. Heat generated by LEDs, LiDAR sensors, ECUs, avionics, telecom equipment, and industrial controllers must be removed efficiently to prevent overheating, performance degradation, and premature failure. Reynolds & Bauhm's CFD enclosure thermal simulation predicts internal air temperature, component junction temperatures, and heat sink performance under real-world operating conditions – from desert sunlight to arctic cold, from high-altitude thin air to coastal salt spray.

Enclosure Thermal Simulation Applications

End-to-end CFD thermal analysis for electronic and optoelectronic enclosures across every industry and environment.

LED Lighting Enclosures

Street, industrial, horticultural, and automotive LED heat sink optimisation. Predict junction temperature, lumen depreciation, and thermal runaway for lifetime warranty validation.

Learn More

LiDAR Enclosures

Thermal and environmental protection for autonomous vehicle, drone, and surveying LiDAR. Manage self-heating, solar gain, and sealed-optics thermal drift.

Learn More

Automotive Enclosures

ECU, BMS, ADAS, and infotainment enclosures for under-hood, under-body, and cabin mounting. Survive -40°C to +85°C ambient with thermal shock and vibration.

Learn More

Aerospace Enclosures

Avionics, satellite, UAV, and ground support equipment thermal management. Altitude effects, radiation heating, and conduction-cooled chassis optimisation.

Learn More

General Electronics

Telecom cabinets, data center edge nodes, industrial PLCs, and outdoor IoT gateways. Passive, forced-air, and liquid-cooled enclosure design.

Learn More

Hot Climate Electrical

Water treatment and industrial electrical enclosures for tropical, desert, and coastal environments. IP66/IP67 with active cooling and anti-condensation.

Learn More

Enclosure Thermal Physics Modelled

Heat Transfer Modes

Electronic enclosures experience coupled heat transfer through natural convection inside the cavity, forced convection from fans and blowers, conduction through mounting rails and heat sinks, radiation between hot components and enclosure walls, and external convection and radiation to the ambient environment. Our conjugate heat transfer models solve all modes simultaneously with geometry-resolved detail.

Internal natural convection with buoyancy-driven flow patterns and stratification
Forced convection from axial and centrifugal fans with swirl and jet impingement
Conduction through PCBs, heat sinks, thermal interface materials, and chassis walls
Surface-to-surface radiation with emissivity and view factor calculation
External solar loading and wind-driven convection for outdoor enclosures

Component-Level Detail

We model at the component level – individual ICs, MOSFETs, LED arrays, laser diodes, power supplies, and capacitors – with their specific heat dissipation, package thermal resistance, and junction-to-case characteristics. This granularity identifies the true thermal bottleneck rather than assuming average enclosure behaviour.

Component-resolved heat generation from datasheets and power budgets
Thermal interface material (TIM) contact resistance and gap conduction
Heat sink fin efficiency, bypass airflow, and base-spreading resistance
PCB copper trace conduction and via thermal resistance networks
Fan curve performance derating for altitude, temperature, and dust loading

Enclosure Thermal Design Parameters

Ambient Temperature Range-55°C to +85°C (automotive/aerospace extended)
Internal Target TemperatureComponent-dependent: typically Tj < 105-150°C
Heat Flux Density0.1 – 50 W/cm² (LED/LiDAR to low-power IoT)
Natural Convection HTC5 – 25 W/m²K (enclosure internal surfaces)
Forced Convection HTC25 – 150 W/m²K (fan-cooled heat sinks)
Heat Sink Thermal Resistance0.1 – 5.0 K/W (size and airflow dependent)
Solar Load (peak)1,000 W/m² (horizontal surface, clear sky)
Altitude DeratingAir density 50% at 5,500 m; fan flow derates linearly

Enclosure Thermal CFD Workflow

1. Geometry Import

PCB, component, heat sink, and enclosure CAD imported. Simplification rules preserve thermal-critical features while enabling efficient meshing.

2. Component Heat Mapping

Power budget±10% to individual components from schematics and datasheets. Special attention to hotspots, voltage regulators, and RF power amplifiers.

3. Mesh Generation

Conformal or immersed boundary mesh with refinement around heat sinks, small gaps, and fan rotors. Boundary layer resolution for y+ < 5 on heat transfer surfaces.

4. Physics Setup

Boussinesq or ideal-gas buoyancy, rotating reference frames for fans, conjugate solid conduction, and surface-to-surface radiation modelled simultaneously.

5. Transient & Parametric

Startup, duty cycle, and seasonal transient runs. Design of Experiments on heat sink geometry, fan speed, vent area, and material selection.

6. Reporting & Validation

Temperature contour plots, component junction temperature tables, airflow streamlines, and design recommendations with prototype correlation plan.

Related Enclosure Thermal Pages

LED Lighting Enclosures

Heat sink and junction temperature optimisation for LED luminaires.

View Page

LiDAR Enclosures

Thermal and environmental protection for autonomous vehicle and drone LiDAR.

View Page

Automotive Enclosures

ECU, BMS, and ADAS thermal management for under-hood and cabin mounting.

View Page

Aerospace Enclosures

Avionics, satellite, and UAV thermal design for altitude and radiation environments.

View Page

General Electronics

Telecom, data center, and industrial control cabinet thermal design.

View Page

Hot Climate Electrical

IP66/IP67 climate-controlled enclosures for extreme environments.

View Page

Heat Exchanger CFD

Liquid-to-air and phase-change heat exchangers for high-heat-flux electronics.

View Page

CFD Thermal Overview

Complete conjugate heat transfer services catalogue.

View Page

Protect Electronics Before Field Deployment

CFD enclosure thermal simulation predicts internal temperatures, identifies hotspots, and validates cooling strategies before prototype fabrication. Speak with our thermal engineers to safeguard your electronics.

Industries We Serve

Our expertise spans multiple industries with sector-specific water treatment solutions.