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Sverre Gullikstad Johnsen

Research Scientist

Sverre Gullikstad Johnsen

Research Scientist

Sverre Gullikstad Johnsen
Phone: 932 03 882
Mobile: 932 03 882
Department: Industrial Process Technology
Office: Trondheim

publications and responsibilities

Publications

Publication

Investigation of CFD simulations of flow in the upper airways

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1467034

This Master's thesis extends previous work conducted in the collaboration project called Modelling of obstructive sleep apnea by fluid-structure interaction in the upper airways. The main objective of the current work was to investigate the importance of including turbulence in CFD models of the hum...

Authors Aasgrav Elin Müller Bernhard Johnsen Sverre Gullikstad Simonsen Are Johan
Year 2017
Type Report
Publication

CFD Simulations of Turbulent Flow in the Human Upper Airways

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1497098

In this paper, investigations are conducted using Reynolds-averaged Navier-Stokes (RANS) turbulence models to investigate the importance of turbulence modelling for nasal inspiration at a constant flow rate of 250 ml/s. Four different, standard turbulence models are tested in a model geometry based ...

Authors Aasgrav Elin Johnsen Sverre Gullikstad Simonsen Are Johan Müller Bernhard
Year 2017
Type Conference paper/Book chapter
Publication

Implementation, Demonstration and Validation of a User-Defined Wall Function for Direct Precipitation Fouling in Ansys Fluent

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1497101

In a previous paper (Johnsen et al., 2015) and presentation (Johnsen et al., 2016), we developed and demonstrated a generic modelling framework for the modelling of direct precipitation fouling from multi-component fluid mixtures that become super-saturated at the wall. The modelling concept involve...

Authors Johnsen Sverre Gullikstad Pääkkönen Tiina Johansen Stein Tore Keiski Riitta Wittgens Bernd
Year 2017
Type Conference paper/Book chapter
Publication

Patient Specific Numerical Simulation of Flow in the Human Upper Airways for Assessing the Effect of Nasal Surgery

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1497103

The study is looking into the potential of using computational fluid dynamics (CFD) as a tool for predicting the outcome of surgery for alleviation of obstructive sleep apnea syndrome (OSAS). From pre- and post-operative computed tomography (CT) of an OSAS patient, the pre- and post-operative geomet...

Authors Jordal Maria Rolstad Johnsen Sverre Gullikstad Dahl Sigrid Kaarstad Müller Bernhard
Year 2017
Type Conference paper/Book chapter
Publication

Implementation and Demonstration of a Boundary Condition Wall Function for Direct Precipitation Fouling CFD Modelling

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1358929

In a previous paper we developed a generic modelling framework, for the diffusive mass transport through the turbulent boundary-layer of multi-component, reactive flows where one or more species may deposit on the wall. In the current paper, we describe the implementation of the modelling framework ...

Year 2016
Type Presentation
Publication

Patient specific numerical simulation of flow in the human upper airways

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1467032

In this master thesis, a patient specific computational fluid dynamics (CFD) study has been done on the air flow in the human upper airways before and after surgical intervention. The patient studied is a 67 years old man who went from having moderate obstructive sleep apnea syndrome (OSAS), to clos...

Authors Jordal Maria Rolstad Müller Bernhard Johnsen Sverre Gullikstad Dahl Sigrid Kaarstad
Year 2016
Type Report
Publication

Experimental Study of Fluid-Structure Interaction in a Simplified Geometry of the Human Upper Airways

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1467029

OSAS (Obstructive Sleep Apnea Syndrome) is a sleep related breathing disorder caused by repetitive collapses of the pharyngeal walls during sleep. The objective of this project is to supply experimental data to validate CFD simulations of fluid-structure Interaction (FSI), used in the prognosis of s...

Authors Broschek Benjamin Sonora Cintia Maria Golpe Müller Bernhard Johnsen Sverre Gullikstad
Year 2015
Type Report
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