Reiknileg efnisfræði - Computational Material Modeling

Verkefni lokið - fréttatilkynning verkefnisstjóra - The PI´s news release


In this work, the development of the Particle Flow Interaction theory, Mark III (or PFI-theory, Mark III) was made.


In this work, the development of the Particle Flow Interaction theory, Mark III (or PFI-theory, Mark III) was made. The PFI-theory is a complex  rheological model for cement suspension that describes its flowing behavior in more detail than existing models. Due to its complexity, this model has to be used in conjunction with the theory of computational fluid dynamics (CFD). In order to retrieve the PFI material parameters from a measurement, the resulting CFD framework was mixed with a certain direct search algorithm. The resulting software is named VVPF 3.3. This approach is very important as modern rheological models are becoming more complicated to better represent the physical reality.

Heiti verkefnis: Reiknileg efnisfræði (Computational Material Modeling)
Verkefnisstjóri: Jón Elvar Wallevik, Nýsköpunarmiðstöð Íslands
Tegund styrks: Verkefnisstyrkur
Styrkár: 2011-2012
Fjárhæð styrks: 7,768 millj. kr. alls
Tilvísunarnúmer Rannís: 110028021

Another research was conducted in this work, consists of calculating the 3D flow behavior inside a 4 blades vane rheometer. The main result of this research is that the vane rheometer is very much influenced by the hydrodynamic pressure and not by the viscous stress and thus is not suitable for PFI analysis.

A new approach is used in analysing the cement suspension. This is by the combination of rheological measurement mixed with the use of computational fluid dynamics (CFD) and a direct search algorithm. This method is now a part of the measuring method available to the department of ICI Rheocenter at the Innovation Center Iceland. The approach developed here will be used in other projects at the ICI Rheocenter. The resulting two project softwares, namely the VVPF 3.3 as well as the interFoamPFI are GNU GPL licensed. As such, their source code will be released on the home page for other research institutes, firms or individuals to use without restriction.

A list of the projects output (reports, journal articles or manuscripts):

  • Wallevik J.E., Oesterheld S., Hjartarson B., Wallevik O.H., (2014), Computational Material Modeling - A new method of analyzing VMAs, ICI Rheocenter, Innovation Center Iceland, Report No. NMI 14-03.
  • Wallevik J.E. (2014), Computational Analysis of Cement Paste Rheological Properties, Computers and Concrete (Techno Press), submitted paper (in second review).
  • Wallevik J.E., (2014) Effect of Hydrodynamic Pressure in a 4-Blades Vane Rheometer, Annual Transactions of the Nordic Rheology Society, Vol. 22.
  • Wallevik, J.E. (2014), Effect of the hydrodynamic pressure on shaft torque for a 4-blades vane rheometer, J. Heat Fluid Flow,
  •  Wallevik, J.E. (2013), Computing the Rheological Behavior of Cement Paste, Understanding the Fundamental Properties of Concrete - Celebrating Professor Erik J. Sellevold on his 75th birthday (Workshop Proceedings), 25th - 26th April 2013, Trondheim, Norway, (Eds: Sidney Mindess and Karla Hornbostel), ISBN 82-7482-101-7.

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