In this picture, we see data visualization of direct numerical simulations of premixed ammonia/hydrogen flames done using the CFD code AVBP. The color legend corresponds to the normalized heat release rate of the four flames that have different ammonia/hydrogen content in the fuel, and different equivalence ratio. The amount of hydrogen increases from left to right, and the equivalence ratio increases from right to left. The work was performed with Thierry Poinsot, Davide Laera, and Victor Coulon, researchers from CERFACS lab at Toulouse, France. Corinna Netzer and Terese Løvås from NTNU also supported this work. Photo: Jessica Gaucherand/NTNU

Just a slightly more scientific/informative (but perhaps less aesthetic) version (no. 1). When sound waves propagate inside a gas turbine, the flames also oscillate in response. This image was made by creating sound waves in a lab model of a gas turbine combustor and then filming the flames at 10,000 frames per second. The video was mathematically transformed into an image that reveals oscillations, and then coloured by relative positions in the oscillation cycle (i.e. phase), so regions with the same colour oscillate in unison. The images were recorded in the Turbulent Combustion Lab. Håkon Tormodsen Nygård helped with setup and filming of the experiment. The idea for this kind of visualisation is taken from Worth et al. 2019. Photo: Abhijat Verma/NTNU

When sound waves propagate inside a gas turbine, the flames also oscillate in response. This image was made by creating sound waves in a lab model of a gas turbine combustor and then filming the flames at 10,000 frames per second. The video was mathematically transformed into an image that reveals oscillations, and then coloured by relative positions in the oscillation cycle (i.e. phase), so regions with the same colour oscillate in unison. The images were recorded in the Turbulent Combustion Lab. Håkon Tormodsen Nygård helped with setup and filming of the experiment. The idea for this kind of visualisation is taken from Worth et al. 2019. Photo: Abhijat Verma/NTNU

Blue flame pine: This is a near lean blow-off methane flame in a long confinement captured in the combustion lab. It looks like a pine tree growing in the quartz which shows the strength of a small seed. Photo: Tong Su/NTNU

Flame feathers: This is a picture taken in the combustion lab using NH3/H2/N2 as fuel when ramping to lean blow-off. The fragmented flames are like feathers fulfilled the whole quartz. Photo: Tong Su/NTNU

The power of you: This is also a photo captures in the combustion lab fueling with CH4 when ramping to lean blow-off. Although you may be not that strong like the flame on the bottom, you can create a huge power which is like the flame downstream. So believe in yourself! Photo: Tong Su/NTNU

Lars Konrad Sørensen doing welding of support plate which will be installed on oil free ammonia water compressor in B036 lab. Photo: Khalid Hamid/NTNU

Erik Larsen is busy in Arc welding in workshop. Photo: Khalid Hamid/NTNU

The Photo were taken in B036 High temperature heat pump lab. The picture show the temperature measurement of water tank during the experiment via infrared camera. Here the infrared camera lying on motor after failing the compressor during experiment. It was a stressful day. Photo: Khalid Hamid/NTNU

Performing PIV measurements over a patient to visualize a thermal plume. Photo: Elyas Larkermani/NTNU

description of the photograph/video: Performing PIV measurements over a patient to visualize a thermal plume Photo: Elyas Larkermani/NTNU

Photo: Maryam Mahmoudzadeh/NTNU

Photo: Maryam Mahmoudzadeh/NTNU

Photo: Maryam Mahmoudzadeh/NTNU

Ignition instant of a methane-ammonia fuel blend in an atmospheric annular combustor (NTNU Turbulent Combustion Lab) is captured on image. The flames appear orange due to the high volume fraction of ammonia in the fuel blend. Samuel Wiseman and Yi Hao Kwah were involved in the photography of this image. Photo: Yi Hao Kwah

A video of low-flying clouds flowing past the main observation pod of the CN Tower in Toronto, Canada. One can see the recirculation region just behind the pod, as well as vortex shedding in the separated shear layer. The video was taken in early January 2023, and is edited to play at X2 speed.

This photo was taken for an experimental campaign where the wing tip vortex of a NACA-4412 is investigated in different turbulent flows using high-speed stereographic particle image velocimetry. The beam path of the laser is visible. Acknowledgement: Simon Dehareng, Srikar Yadala Venkata, Girish Jankee

An array of nails was inserted into the surface of a flowing water tank, creating a matrix of interacting surface ripples that crosses each other in a grid pattern. The central bright section is a backlit acrylic plate with printed random dot patterns. These dots can be used to measure the surface topography in a process known as synthetic Schlieren. The purpose of the experiment was to shed illuminating insight into how surface waves and turbulence affect oxygen dissolve rate into water. The experiment was conducted by Leon Li and Pim Bullee. Acknowledgements: Pim Bullee

Description: This photo was taken while Srikar Yadala Venkata, at the right side of the photo, was taking pictures for an experimental campaign where the wing tip vortex of a NACA-4412 is investigated in different turbulent flows using high-speed stereographic particle image velocimetry. The glass walls reflect the LED lighting and single structures of the wind tunnel . Acknowledgement: Simon Dehareng, Srikar Yadala Venkata, Girish Jankee

This photo was taken during the wind tunnel refurbishment when the new honeycombs in the settling chamber were welded. The welder needed good lighting, which created an interesting view from the other side through the honeycombs. Acknowledgement: The EPT Technicians, who have done the wind tunnel refurbishment.

Description: A planar PIV set up for measuring the vortex shedding of two cylinders in tandem. The initial beam is split up into two, so that both sides of the cylinders can be illuminated without shadows. The experiments were conducted by Girish Jankee and Srikar Yadala V. Acknowledgements: Girish Jankee, Srikar Yadala Venkata