Applied Physics & Engineering Consulting · Lund, Sweden

Applied Physics. Engineered Solutions.

Turning complex physical processes into actionable data.

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What We Offer

Coupling Physical Measurement with Simulation

We help engineering teams and technology companies solve difficult physical challenges. Our core strength is designing custom experiments and non-invasive optical diagnostics, coupled directly with multiphysics simulations to provide clear physical insight and practical engineering solutions.

01 / EXPERIMENT

Custom Test Benches & Prototyping

Dedicated test rigs, experimental setups, and functional prototypes designed from first principles to validate hardware under real operating conditions.

02 / DIAGNOSTICS

Optical & Non-Invasive Sensing

Measuring what conventional sensors cannot reach: laser diagnostics, high-speed imaging, and spectroscopy for reactive or high-temperature systems.

03 / INSIGHT

Simulation Coupled with Data

Multiphysics and CFD modeling calibrated directly against physical measurements to interpret complex behavior and optimize performance.

04 / ADVISORY

Contract R&D & De-Risking

Flexible R&D partnerships for startups and engineering teams, covering early feasibility testing through to complete validation campaigns.

Capabilities

Empirical Engineering & Multiphysics Modeling

We offer custom experimental design and in-situ optical diagnostics, complemented by OpenFOAM CFD and multiphysics modeling to validate hardware and uncover root-cause physics.

01 / EXPERIMENT

Experimental Design & Custom Test Rigs

Building physical experiments to test engineering concepts under operating conditions. We design and assemble test benches, custom experimental setups, and functional prototypes from first principles to validate hardware before scale-up.

  • Custom experimental setups, turnkey test rigs & specialized flow loops
  • Extreme environments: high-temperature (>1000°C), high-voltage & reactive gases
  • Optical access engineering: quartz/sapphire windows, purge curtains & anti-fouling gas shields
  • Precision optomechanics, laser beam routing & optical alignment fixtures
  • Automated DAQ, trigger synchronization & interlock safety architectures
02 / MEASUREMENT

Optical Diagnostics & In-Situ Measurement

Measuring physical phenomena directly where conventional sensors fail. We deploy laser diagnostics, high-speed imaging, and spectroscopy to measure temperature, velocity, species, and field distributions in harsh environments.

  • Techniques: Laser-Induced Fluorescence (LIF) & Optical Emission Spectroscopy (OES)
  • Imaging: High-speed Schlieren, shadowgraphy & 4D multi-camera emission tomography
  • Temperature: Gas-phase & surface thermometry (>1000°C) and phosphor thermometry
  • Flows & Velocity: Spatially resolved velocity vectors, planar laser sheets & turbulent mixing
  • Species & Fields: Reactive radical tracking, concentration profiles & electric fields (EFISH)
03 / COMPUTATION

Multiphysics Modeling & OpenFOAM CFD

Numerical physics designed to complement and guide physical experiments. We build computational workflows with OpenFOAM, Python, C++, and Julia, calibrated directly against laboratory measurements.

  • OpenFOAM CFD: compressible, turbulent, multiphase & reactive flows
  • Conjugate heat transfer (CHT), thermal radiation & extreme cooling design
  • Coupled physics: magnetohydrodynamics (MHD), induction heating & plasma dynamics
  • Scientific computing & numerical algorithms in modern C++20, Julia, and Python
  • Automated parametric sweeps, volumetric reconstruction & empirical calibration
04 / ADVISORY

Applied Physics Advisory & De-Risking

Translating physical principles into sound engineering decisions. We advise engineering leaders and R&D teams on physical feasibility, experimental campaign design, and root-cause failure modes in coupled systems.

  • First-principles feasibility assessments, physical sanity checks & scaling laws
  • Experimental campaign design, instrumentation planning & test matrix architecture
  • Root-cause failure analysis for coupled thermal, fluid, and electrical systems
  • Techno-economic modeling and empirical risk reduction for deep-tech hardware
  • Technical work package leadership for industrial R&D and research consortia
Experimental Work & Diagnostics

Experimental Setups & Physical Insights

Direct measurements, custom test rigs, and multiphysics modeling deployed across extreme thermal, reactive, and plasma environments.

OpenFOAM CFD RF Induction Plasma Torch Simulation
OpenFOAM 10,000 K Core Recirculation

RF Induction Plasma Torch Aerodynamics & Thermal Field

Coupled magnetohydrodynamic (MHD) and compressible flow simulation in OpenFOAM, capturing 10,000 K core thermal anchoring and counter-rotating recirculation vortices.

Phosphor Thermometry
In-Situ Video Jet Engine Test Section Surface Heat Transfer

In-Situ Surface Thermometry on Jet Engine Bluff Body

Laser-Induced Phosphorescence (LIP) resolving dynamic surface heat transfer and thermal gradients on a bluff body inside a scaled-down jet engine test section.

Raman Spectroscopy
In-Situ Video >3,750 K Gas Calibrated Fit

Gas-Phase Raman Thermometry on DC Plasma Torch

Spatially resolved Raman spectroscopy on a DC plasma torch measuring gas temperature profiles up to 3,758 ± 16 K down the exhaust nozzle, validated against theoretical spectral fits.

MAX IV Beamline MAX IV HIPPIE Beamline
MAX IV HIPPIE AP-XPS + OES Synchrotron

Operando Plasma Catalysis at MAX IV (HIPPIE)

Synchrotron beamline campaign combining Ambient-Pressure X-ray Photoelectron Spectroscopy (AP-XPS) with Optical Emission Spectroscopy (OES) to track catalyst surface chemistry in real time.

3D Tomo + Planar LIF 3D Arc Tomography & Planar OH-LIF
3D Volumetric Planar LIF OH Radicals

3D Arc Tomography & Planar OH Radical LIF

Simultaneous 3D volumetric emission reconstruction of an atmospheric gliding arc filament coupled with planar Laser-Induced Fluorescence (LIF) of the reactive OH radical field.

2,000 FPS 4D Tomo
In-Situ Video 2,000 FPS Multi-Camera Array

4D High-Speed Flame Tomography (2,000 fps)

Time-resolved 4D volumetric emission tomography of flame structures recorded at 2,000 frames per second using a synchronized multi-camera array on an optical table.

Collaborations & Consortia

Organizations & Partners Worked With

Collaborative research, contract R&D, and technical investigations conducted with leading research institutes, universities, and industrial research committees.

RISE

Research Institutes of Sweden

Lund University

Lunds universitet

Jernkontoret

TO 51 · Energy & Furnace Technology

Background

Dr. Sebastian Nilsson

Dr. Sebastian Nilsson

Dr. Sebastian Nilsson is an applied physicist and engineering consultant. He holds a Ph.D. in Physics from Lund University, specializing in laser diagnostics, optical sensors, and reactive plasma flows, and an M.Sc. in Engineering Physics from Luleå University of Technology.

With 6+ years of experience in optical measurement techniques and laser diagnostics, he has led technical work packages for European research consortia (including EU Horizon 2020 and ERC projects) and published 20+ scientific papers in journals such as Nature Portfolio, Applied Physics Letters, and Optics Express.

Google Scholar Profile → LinkedIn Profile →
Education Ph.D. in Physics · Lund University Laser Diagnostics, Optical Sensors & Plasma Physics (2020–2024)
Undergraduate M.Sc. Engineering Physics · LTU Computational Physics & Applied Mathematics (2015–2020)
Publications 20+ Scientific Papers Nature Portfolio, Applied Physics Letters & Optics Express
Location & Eligibility Lund / Malmö, Sweden Swedish Citizen · Security Clearance Eligible (2018:585)
Contact

Start a Discussion

Direct, technical discussions on simulation scope, custom optical setups, or contract R&D projects.

Direct Email sebastian@lumenrd.com
Location Lund / Malmö, Sweden
Availability Consulting & Contract R&D Worldwide