What is a thermal digital twin?

A thermal model that stays correlated to measured device behavior across the product lifecycle — concept, design, qualification, production and field — rather than a one-time simulation built for a single design review.

How do you share a thermal model with a customer without exposing internal IP?

Flotherm exports a boundary-condition-independent reduced-order model (BCI-ROM) — a compact, executable thermal model that predicts junction temperature under the customer's operating conditions without exposing internal package geometry.

How often should a thermal model be re-validated against measurement?

At each significant lifecycle stage where new measured data becomes available — design correlation, qualification power cycling, and production or field structure-function monitoring — so the model reflects the part as it actually behaves, not only as originally designed.

01Thermal Digital Twin

How do I build a thermal model I can actually trust across the product's life, not just at design sign-off?

A thermal model kept accurate from concept through field operation with measured correlation at every stage.

02The problem

Most thermal models are built once for a design review and then abandoned — they are never updated as the design changes, never validated against the shipped hardware, and never carried forward to explain field behavior. When a field issue arises months later, engineering has to start from scratch.

A thermal digital twin means something different: a model that stays connected to measured reality across concept, design, qualification, production and field — so a question raised in the field can be traced back through a model that was validated at each stage, not rebuilt from memory.

Why it's hard

Thermal models built during concept and design are rarely revisited or re-validated once the product ships
A model's usefulness depends on staying connected to measured data at each lifecycle stage — concept, design, qualification, production, field — and most workflows only connect simulation and measurement once, if at all
Sharing a full thermal model with a customer or system integrator exposes internal geometry and IP that most component suppliers are unwilling to disclose
Reduced-order models that are portable enough to share still need to be accurate enough to be useful, which requires validation against measured device behavior
Production and field data (structure-function drift, screening results) rarely feeds back into the design-stage thermal model even when it would improve the next revision

03How we solve it

Predict — simulation

Build the initial thermal model in Flotherm, FLOEFD or STAR-CCM+ at the appropriate stage — chiplet/die, package, PCB, enclosure, system, or system of systems
Export a boundary-condition-independent reduced-order model (BCI-ROM) from Flotherm so a compact, executable thermal model can be shared with an OEM or system integrator without exposing internal geometry

Measure — hardware

Validate the model against measured device thermal transient response with Simcenter Micred T3Ster at design, qualification and production stages
Continue monitoring structure-function data through power cycling and production screening with Simcenter Micred Power Tester and Simcenter Micred Industrial T3Ster

Correlate — close the loop

Re-correlate the model at each lifecycle stage against the measurement taken at that stage, rather than validating once and treating the model as static
Use field and production structure-function data to keep the model current as the design or manufacturing process evolves

04Tools applied

Flotherm

BCI-ROM export for shareable, boundary-condition-independent thermal models

Simcenter Micred T3Ster

Measurement validation of the model at design and qualification stages

Simcenter Micred Power Tester

Reliability qualification data to keep the model current at end of life

Simcenter Micred Industrial T3Ster

Production and field structure-function monitoring

05Standards in scope