Next Article in Journal
Quantum Dot Solar Cells: Small Beginnings Have Large Impacts
Previous Article in Journal
Enzyme Assisted Extraction, Purification and Structure Analysis of the Polysaccharides from Naked Pumpkin Seeds
 
 
Article

Mesh Twisting Technique for Swirl Induced Laminar Flow Used to Determine a Desired Blade Shape

1
Faculty of Industrial Engineering, Mechanical Engineering and Computer Science, University of Iceland, Hjardarhagi 2-6, 107 Reykjavik, Iceland
2
LAMIH UMR 8201, UVHC, Campus Mont Houy, 59313 Valenciennes CEDEX 9, France
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(10), 1865; https://doi.org/10.3390/app8101865
Received: 23 August 2018 / Revised: 21 September 2018 / Accepted: 2 October 2018 / Published: 10 October 2018
(This article belongs to the Section Mechanical Engineering)
Swirling flow has been shown to increase heat transfer in heat exchangers. However, producing swirl while not presenting a severe pressure drop can be a challenge. In this paper, a desired shape of guidance blades for laminar swirl flow is determined by numerical simulation in OpenFOAM. Emphasis is on the mesh technique, where a predefined blade shape is formed by mesh twisting, or morphing. The validity of numerical simulations on a twisted mesh is shown by comparing it to the theoretical solution of laminar flow in a pipe without swirl and guidance blades. A sensitivity study shows that a cell size ratio of 0.025 of diameter is sufficient and affects the solution minimally. To determine the desired shape of guidance blades previously found optimal swirl decay and velocity profile for laminar swirling flow are utilized. Three blade shapes are explored: (I) with a twist angle that varies with axial location only; (II) having a deviation angle matching the theoretical deviation angle for laminar swirling flow; (III) same as II but with a hollow center. Simulations are performed for Re = 100 and swirl number S = 0.2 . Case II is able to sustain swirl longest while maintaining a low pressure drop and is therefore a desired swirler shape profile as predicted theoretically. View Full-Text
Keywords: swirling flow; laminar flow; mesh morphing; guidance blades/vanes; OpenFOAM swirling flow; laminar flow; mesh morphing; guidance blades/vanes; OpenFOAM
Show Figures

Figure 1

MDPI and ACS Style

Helgadóttir, Á.; Lalot, S.; Beaubert, F.; Pálsson, H. Mesh Twisting Technique for Swirl Induced Laminar Flow Used to Determine a Desired Blade Shape. Appl. Sci. 2018, 8, 1865. https://doi.org/10.3390/app8101865

AMA Style

Helgadóttir Á, Lalot S, Beaubert F, Pálsson H. Mesh Twisting Technique for Swirl Induced Laminar Flow Used to Determine a Desired Blade Shape. Applied Sciences. 2018; 8(10):1865. https://doi.org/10.3390/app8101865

Chicago/Turabian Style

Helgadóttir, Ásdís, Sylvain Lalot, Francois Beaubert, and Halldór Pálsson. 2018. "Mesh Twisting Technique for Swirl Induced Laminar Flow Used to Determine a Desired Blade Shape" Applied Sciences 8, no. 10: 1865. https://doi.org/10.3390/app8101865

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop