Anders Hammer Strømman på sitt kontor 28. august 2025. Bilde tatt i forbindelse med at han er utnevnt som Coordinating Lead Author (CLA), den høyest rangerte forfatterrollen for et kapittel, i FNs klimapanel (IPCC) sin neste hovedrapport om klimaomstilling. Foto: Martin Hansen/NTNU

Aritra Mukherjee ved Institutt for energi- og prosessteknikk, 10.10.2025. Foto: Maren Agdestein/NTNU.

Vanlig tekst.

The flags shown in the photo were found in both damaged and reusable textile collection bins at Trondheim Renholdsverk. Pictured is Magnus Gilje, highlighting the surprising variety of items that end up in textile waste. The photo was taken by Ronja Røli Ansnes.

"The image shows fluorescent rhodamine dye in a turbulent water flow close to the surface. By taking the maximum intensity over 900 pictures, the resulting image shown here effectively overlays all high dye concentration swirls on top of each other, revealing a web of turbulent patterns contained within the flow as well as the reflection on the free surface. Equal contributions from Priyanka Gautam and Olav Rømcke" Foto: Olav Rømcke and Priyanka Gautam. Bidrag til NTNU EPTs fotokonkurranse for 2025.

"This image translates complex battery cycling data into a vibrant color portrait. The red channel visualizes subtle electrochemical shifts (dQ/dV), the green channel traces the evolution of voltage, and the blue channel reveals minute capacity changes. By stacking these Gramian Angular Fields as RGB channels, we transform raw numbers into a unique visual fingerprint, revealing hidden patterns and transitions that would otherwise remain invisible to the naked eye". Ill.: Vamsi Krishna Garapati. "I am industrial Ph.D. Candidate supervised by Jacob Joseph Lamb. He has helped me in envisioning this and encouraged me to submit for this competition" Bidrag til NTNU EPTs fotokonkurranse for 2025.

"Title: Blowing out a candle - Visualising heat waves with Schlieren photography Time series (left to right) showing blow out of a candle flame. Due to the difference in the refractive index of heated gas, the heat waves can be visualised by Schlieren photography. Light from a point source is aimed towards a spherical mirror which focuses the light back to a point, where a knife edge is placed to cut out undistorted light. In this way, any changes in the density caused by the candle, placed between the light and the mirror, appear as a sharp contrast (red/black) in the image due to refraction." Ill.: Eirik Æsøy. Bidrag til NTNU EPTs fotokonkurranse for 2025.

""Rise of Renewables" – The share of renewable* power in the European** generation mix. This time series is illustrated using polar coordinates — a helpful visualization for examining recurring seasonal patterns and long-term trends. Starting from January on the right, the time series loops counterclockwise around the circle, representing the full year. It shows nine years of data observed on hourly basis. Concentric reference lines are shown at 10%, 25%, and 50%. The plot reveals daily spikes, weekly fluctuations, seasonal peaks, and an overall increase in renewable share in recent years compared to earlier ones. Research and practices on renewable power technologies, energy efficiency and flexibility, energy economics, and quantitative sustainability analysis are among the key enablers of the transition toward renewable-dominated — and therefore greener — power systems. * Renewable sources considered: biomass, geothermal, hydro, solar, wind, marine. ** Includes 36 countries participating in the European Network of Transmission System Operators for Electricity (ENTSO-E). Data source: ENTSO-E Transparency Platform (https://transparency.entsoe.eu/)." Ill. by Ruslan Zhuravchak. Bidrag til NTNU EPTs fotokonkurranse for 2025.

"Rise of Renewables" – The share of renewable* power in the European** generation mix. This time series is illustrated using polar coordinates — a helpful visualization for examining recurring seasonal patterns and long-term trends. Starting from January on the right, the time series loops counterclockwise around the circle, representing the full year. It shows nine years of data observed on hourly basis. Concentric reference lines are shown at 10%, 25%, and 50%. The plot reveals daily spikes, weekly fluctuations, seasonal peaks, and an overall increase in renewable share in recent years compared to earlier ones. Research and practices on renewable power technologies, energy efficiency and flexibility, energy economics, and quantitative sustainability analysis are among the key enablers of the transition toward renewable-dominated — and therefore greener — power systems. * Renewable sources considered: biomass, geothermal, hydro, solar, wind, marine. ** Includes 36 countries participating in the European Network of Transmission System Operators for Electricity (ENTSO-E). Data source: ENTSO-E Transparency Platform (https://transparency.entsoe.eu/). Ill.by Ruslan Zhuravchak. Bidrag til NTNU EPTs fotokonkurranse for 2025.

"We have used a data-driven method known as Sparse Identification of Nonlinear Dynamics (SINDy) on experimental data to find a partial differential equation that describes the observed phenomena. The first row in the figure displays the phase-averaged experimental data, while the second row shows the solution to the differential equation." Ill.: Kjell Søren Heinrich . Bidrag til NTNU EPTs fotokonkurranse for 2025.

"The flags shown in the photo were found in both damaged and reusable textile collection bins at Trondheim Renholdsverk. Pictured is Magnus Gilje, under a Norwegian flag, highlighting the surprising variety of items that end up in textile waste. The photo was taken by Ronja Røli Ansnes."Bidrag til NTNU EPTs fotokonkurranse for 2025.

Two long exposure images showing particle pathlines in a tank of water. Upon closer inspection, the pathlines exhibit small sinusoidal perturbations that are probably not present in the actual flow. The cause of these perturbations is unclear but is most likely an optical effect. Photo: Ali Semati. Bidrag til NTNU EPTs fotokonkurranse for 2025.

Plagg sortert av studenter ved Attvin i sommer, funnet blant klær sortert som "ikke brukbare for andre" levert i Ålesund. Bilde 2 har tittel "kalde netter, varme dager". Fotograf er Bettina Amundsen Hermanrud, Silje Barstad Alnes, og Sunneva Grooss Gunnarsdottir. Bidrag til NTNU EPTs fotokonkurranse for 2025.

"Experiments driven in the water channel, study of floating particles behaviour in the presence of waves and turbulence. Wave trains with side LED lighting. " Video: Mathieu Lapeze, with help from Olav Rømcke. Bidrag til NTNU EPTs fotokonkurranse for 2025.

Two long exposure images showing particle pathlines in a tank of water. Upon closer inspection, the pathlines exhibit small sinusoidal perturbations that are probably not present in the actual flow. The cause of these perturbations is unclear but is most likely an optical effect. Photo: Ali Semati. Bidrag til NTNU EPTs fotokonkurranse for 2025. Photo: Ali Semati. Bidrag til NTNU EPTs fotokonkurranse for 2025.

"Video showing the transition from methane (CH₄, a carbon-containing fuel) to hydrogen (H₂, a carbon-free fuel) and its effect on flame shape and thermoacoustic behaviour in a lab-scale combustor. As the fuel composition changes, the system transitions between two stable and two unstable thermoacoustic states. First, a low-frequency instability is triggered, followed by a high-frequency mode at high hydrogen concentrations. The high-frequency instability also causes a significant increase in heat transfer to the quartz wall, visualised through thermal radiation (appearing as red). The video highlights a key challenge in using hydrogen as a fuel: its higher tendency to trigger thermoacoustic instabilities." Video: Eirik Æsøy. Bidrag til NTNU EPTs fotokonkurranse for 2025.

"Experiments driven in the water channel, study of floating particles behaviour in the presence of waves and turbulence." Foto: Mathieu Lapeze Bidrag til NTNU EPTs fotokonkurranse for 2025.

Kunstverk laget av studenter ved Avfall Sør i Kristiansand, fremstilt av klær levert til sortering. Tittel er "en jord der klærne bor, kan vi ønske mer?". Fotografer er Anniken Heum Muri, Torje Igland Hellerslia, og Ylva Hognestad Bidrag til NTNU EPTs fotokonkurranse for 2025.

"Experiments driven in the water channel, study of floating particles behaviour in the presence of waves and turbulence. Wave trains with side LED lighting. " Video: Mathieu Lapeze. Bidrag til NTNU EPTs fotokonkurranse for 2025.

Plagg sortert av studenter ved Attvin i sommer, funnet blant klær sortert som "ikke brukbare for andre" levert i Ålesund. Foto: Johan Berg Pettersen. Bidrag til NTNU EPTs fotokonkurranse for 2025.

"Description: This photograph, captured during experiments in the water channel facility of the Thermo-Fluids Group, depicts the well-known phenomenon of light refraction. A laser sheet projected above a wind-ruffled water surface bends as it passes through, its path altered by the wave shapes. These variations lead to a visual manifestation of fluid motion and optical physics intertwined, the Threads of Light." Photo: Srikar Yadala Venkata. Bidrag til NTNU EPTs fotokonkurranse for 2025.

"The flags shown in the photo were found in both damaged and reusable textile collection bins at Trondheim Renholdsverk. Pictured is Magnus Gilje, under a Norwegian flag, highlighting the surprising variety of items that end up in textile waste. The photo was taken by Ronja Røli Ansnes." Bidrag til NTNU EPTs fotokonkurranse for 2025.

"Sko levert og sortert av studenter ved UFF i Stavanger, til gjenbruk. Tittel: "The Path Forward". Fotografer: Bård Fjelltun Haddal, Dorthe Storvik Martinussen, Yngvil Sveen Øyen Bidrag til NTNU EPTs fotokonkurranse for 2025.

"The flags shown in the photo were found in both damaged and reusable textile collection bins at Trondheim Renholdsverk. Pictured are Magnus Gilje, Victoria Olajumoke Obanla, and Edyy Vanessa Pena Benitez proudly holding several Norwegian flags, highlighting the surprising variety of items that end up in textile waste. The photo was taken by Ronja Røli Ansnes." Bidrag til NTNU EPTs fotokonkurranse for 2025.