The grand ambition to electrify every facet of our modern world, from the humblest household appliance to the most formidable aircraft, is encountering a stark reality.

What performs flawlessly on a lab bench often falters, or even fails spectacularly, when subjected to the crucible of real-world operation.

The sheer complexity of safely harnessing and storing energy at scales ranging from a compact electric vehicle battery to an entire national grid presents a prototyping problem that simplified engineering models simply cannot fathom.

It’s a challenge that demands a new paradigm, a more holistic understanding of the forces at play.

At the heart of this electrification drive lies an intricate dance of physical phenomena.

“In electrification, at its core, you have this combination of electromagnetic effects, heat transfer, and structural mechanics in a complicated interplay,” explains Bjorn Sjodin, senior vice president of product management at the Stockholm-based software company COMSOL.

His firm is at the forefront of a burgeoning field known as multiphysics modeling, a sophisticated approach that moves beyond simulating a single phenomenon – such as the electrical behavior of a circuit – to encompass all the pertinent physics simultaneously.

This comprehensive simulation, discussed recently by engineers and developers at COMSOL’s annual Boston conference, is rapidly evolving from a niche academic pursuit into an indispensable component of electrification R&D.

For too long, simulation has been viewed by some as an esoteric, “fancy R&D thing,” a mere digital stand-in for tangible experiments.

Niloofar Kamyab, a chemical engineer and applications manager at COMSOL, challenges this perception.

“Because they see it as a replacement for experiments. But no, experiments still need to be done, though experiments can be done in a more optimized and effective way.”

Her insight underscores a critical shift: multiphysics isn’t about eliminating physical testing, but about refining it, making it more efficient, safer, and ultimately, more insightful.

It’s about understanding the invisible forces before they manifest as costly, or even dangerous, failures.

Nowhere is this more evident than in the realm of batteries, the very lifeblood of our electrified future.

Batteries are notoriously complex, revealing unpredictable behaviors and even dangerous runaway reactions at the microscopic cell level, which then cascade into new, equally unpredictable issues at the larger battery-pack scale.

“Most of the people who do simulations of battery packs, thermal management is one of their primary concerns,” Kamyab notes.

Multiphysics simulation allows engineers to virtually recreate a malfunctioning cell, testing how designs behave under extreme conditions without risking actual fires or catastrophic failures.

It’s a critical tool for pre-empting problems, offering “in-depth analysis that, if not very hard, I would say is impossible to do experimentally.”

This advanced simulation also opens doors to truly innovative design.

Consider the work of Berlin-based automotive engineering company IAV, which is pioneering powertrain systems that integrate multiple battery formats and chemistries within a single pack.

Kamyab highlights their ingenious approach: “Sodium ion cannot give you the energy that lithium ion can give.

So they came up with a blend of chemistries, to get the benefits of each, and then designed a thermal management that matches all the chemistries.”

Jakob Hilgert, a technical consultant at IAV, elaborated on a dual-chemistry pack combining sodium-ion cells with more expensive lithium solid-state batteries.

Multiphysics simulation allowed IAV to strategically leverage the distinct thermal properties of each chemistry.

“If we have some cells that can operate at high temperatures and some cells that can operate at low temperatures, it is beneficial to take the exhaust heat of the higher-running cells to heat up the lower-running cells, and vice versa,” Hilgert explained, describing a sophisticated cooling system that dynamically shifts energy to optimize performance across varying thermal preferences.

The transformative power of multiphysics extends far beyond batteries.

In wireless charging systems, localized heating of coils at higher power levels can alter conductivity, impacting the entire circuit and surrounding elements, a challenge Nirmal Paudel, a lead engineer at Veryst Engineering, points out.

Traditional design cycles, which merely tweaked coil geometry, are giving way to integrated multiphysics platforms that enable the exploration of entirely new charging architectures, including flexible textiles and smart surfaces that adapt in real-time.

Similarly, in electric motors and power converters, older development methods are proving inadequate.

Vignesh Gurusamy, an electrical engineer and COMSOL senior application engineer, stresses the need for a “more holistic approach” to achieve optimal designs, especially as the demand for higher power density and efficiency intensifies.

Even seemingly simple components, like the copper windings in a motor’s stator, present parameters that multiphysics can optimize by coupling electromagnetic and thermal simulations to incorporate temperature-dependent behavior.

The implications ripple out to larger infrastructure as well.

Freight transportation, for instance, grapples with the choice between batteries and fuel cells.

Sjodin notes that fuel cells are “very multiphysics friendly,” involving complex interactions of fluid flow, heat transfer, and chemical and electrochemical reactions.

And then there’s the electric grid itself, traditionally designed for continuous power.

The increasing integration of intermittent sources like wind and solar introduces “completely new problems” that demand a sophisticated understanding of fluctuating loads and dynamics, precisely what multiphysics can provide.

This all-in approach, combining algorithmic and hardware advancements, is fundamentally reshaping the engineering landscape.

As Sjodin observes, these improvements “multiply together,” allowing for the simulation of “larger and larger, more realistic systems.”

This capability is not merely an incremental upgrade; it is a catalyst for breakthroughs that were once confined to the realm of science fiction.

Kamyab powerfully articulates this sentiment when discussing the advancements in battery technology.

“The reason that many ideas that we had 30 years ago are becoming a reality is now we have the batteries to power them,” she says, citing the emergence of electric vertical take-off and landing aircraft (eVTOLs) as a prime example.

The bottleneck of energy storage is finally yielding, and multiphysics modeling is the engine driving this liberation.

As battery technology continues its relentless march forward, fueled by the insights gleaned from these intricate simulations, the question isn’t just what new devices we’ll electrify, but what entirely new industries and possibilities we are poised to unlock.

The future, it seems, is not just electric, but intelligently, comprehensively simulated.