Institution
Norwegian Institute of Technology
About: Norwegian Institute of Technology is a based out in . It is known for research contribution in the topics: Speckle pattern & Finite element method. The organization has 2444 authors who have published 3123 publications receiving 98149 citations. The organization is also known as: NTH.
Papers published on a yearly basis
Papers
More filters
••
01 Jan 1977TL;DR: In this paper, a model for the rate of combustion which takes into account the intermittent appearance of reacting species in turbulent flames is presented, which is applicable to premixed as well as diffusion flames.
Abstract: Principles of mathematical models as tools in engineering and science are discussed in relation to turbulent combustion modeling. A model is presented for the rate of combustion which takes into account the intermittent appearance of reacting species in turbulent flames. This model relates the rate of combustion to the rate of dissipation of eddies and expresses the rate of reaction by the mean concentration of a reacting specie, the turbulent kinetic energy and the rate of dissipation of this energy. The essential features of this model are that it does not call for predictions of fluctuations of reacting species and that it is applicable to premixed as well as diffusion flames. The combustion model is tested on both premixed and diffusion flames with good results. Special attention is given to soot formation and combustion in turbulent flames. Predictions are made for two C 2 H 2 turbulent diffusion flames by incorporating both the above combustion model and the model for the rate of soot formation developed by Tesner et al., as well as previous observations by Magnussen concerning the behavior of soot in turbulent flames. The predicted results are in close agreement with the experimental data. All predictions in the present paper have been made by modeling turbulence by the k -∈ model. Buoyancy is taken into consideration in the momentum equations. Effects of terms containing density fluctuations have not been included.
2,575 citations
••
TL;DR: This review evaluates the potential of entrapment of cells within spheres of Ca2+ alginate gels on the basis of the current knowledge of structural and functional relationships in alginATE gels.
1,762 citations
••
TL;DR: In this article, a theoretical model for the prediction of drop and bubble (fluid-particle) breakup rates in turbulent dispersions was developed, based on the theories of isotropic turbulence and probability and contains no unknown or adjustable parameters.
Abstract: A theoretical model for the prediction of drop and bubble (fluid-particle) breakup rates in turbulent dispersions was developed. The model is based on the theories of isotropic turbulence and probability and contains no unknown or adjustable parameters. Unlike previous work, this model predicts the breakage rate for original particles of a given size at a given combination of the daughter particle sizes and thus does not need a predefined daughter particle size distribution. The daughter particle size distribution is a result and can be calculated directly from the model. Predicted breakage fractions using the model for the air–water system in a high-intensity pipeline flow agree very well with the available 1991 experimental results of Hesketh et al. Comparisons of the developed model for specific particle breakage rate with earlier models show it to give breakage-rate values bracketed by other models. The spread in predictions is high, and improved experimental studies are recommended for verification.
988 citations
••
TL;DR: Beads with the highest mechanical strength, lowest shrinkage, best stability towards monovalent cations, and highest porosity were made from alginate with a content of L‐guluronic acid higher than 70% and an average length of the G‐blocks higher than 15.4 × 105.
Abstract: Calcium alginate gel beads were prepared from a range of well characterized alginates. The physical properties of beads depended strongly on the composition, sequential structure, and molecular size of the polymers. Beads with the highest mechanical strength, lowest shrinkage, best stability towards monovalent cations, and highest porosity were made from alginate with a content of L-guluronic acid higher than 70% and an average length of the G-blocks higher than 15. For these "high G" alginates the critical overlap intrinsic viscosities have been determined, and for molecular weight higher than 2.4 x 10(5), the gel strength was independent of the molecular weight.
902 citations
Authors
Showing all 2444 results
Name | H-index | Papers | Citations |
---|---|---|---|
Bharat Bhushan | 116 | 1276 | 62506 |
Terje Espevik | 85 | 297 | 33089 |
Olav Smidsrød | 72 | 297 | 21237 |
Thor I. Fossen | 69 | 360 | 22120 |
De Chen | 66 | 409 | 14840 |
Tor Arne Johansen | 64 | 626 | 17495 |
Terje Aven | 63 | 357 | 13156 |
Sigurd Skogestad | 62 | 505 | 23576 |
Per-Simon Kildal | 60 | 504 | 13470 |
Gudmund Skjåk-Bræk | 60 | 153 | 14391 |
Odd Sture Hopperstad | 57 | 331 | 12292 |
Kjell M. Vårum | 56 | 95 | 10459 |
Hallvard F. Svendsen | 56 | 295 | 11278 |
Kuldip K. Paliwal | 56 | 366 | 16889 |
Emilio Elizalde | 55 | 439 | 15636 |