Nils Erland L. Haugen
Nils Erland L. Haugen
Publikasjoner og ansvarsområder
The effect of Stefan flow on Nusselt number and drag coefficient of spherical particles in non-isothermal gas flow
A Stefan flow can be generated during a phase change or reactions of a particle immersed in a fluid. This study investigates the effect of Stefan flow on the exchange of momentum (drag coefficient (CD)) and heat transfer (Nusselt number (Nu)) between the particle and bulk-fluid. Fully resolved...
The effect of turbulence on mass transfer in solid fuel combustion: RANS model
In this paper, a kinetic-diffusion surface combustion model is examined. The model is modified such that two effects of turbulence are included: 1) enhancement of the mass transfer due to relative velocity between particles and fluid and 2) reduction of the mass transfer due to turbulence-induced...
Condensational and Collisional Growth of Cloud Droplets in a Turbulent Environment
We investigate the effect of turbulence on the combined condensational and collisional growth of cloud droplets by means of high-resolution direct numerical simulations of turbulence and a superparticle approximation for droplet dynamics and collisions. The droplets are subject to turbulence as well...
Drag force for a burning particle
Assessment of Transient NOx Reduction Potential in Wood Stoves
Cloud-droplet growth due to supersaturation fluctuations in stratiform clouds
Condensational growth of cloud droplets due to supersaturation fluctuations is investigated by solving the hydrodynamic and thermodynamic equations using direct numerical simulations (DNS) with droplets being modeled as Lagrangian particles. The supersaturation field is calculated directly by...
The effect of Stefan flow on the drag coefficient of spherical particles in a gas flow
Particle laden flows with reactive particles are common in industrial applications. Chemical reactions inside the particle can generate a Stefan flow that affects heat, mass and momentum transfer between the particle and the bulk flow. This study aims at investigating the effect of Stefan flow on...