scholarly journals Vortex simulations of wind turbines operating in atmospheric conditions using a prescribed velocity-vorticity boundary layer model

Wind Energy ◽  
2018 ◽  
Vol 21 (11) ◽  
pp. 1216-1231 ◽  
Author(s):  
Néstor Ramos-García ◽  
Henrik Juul Spietz ◽  
Jens Nørkaer Sørensen ◽  
Jens Honoré Walther
Keyword(s):  
Boundary Layer ◽  
Wind Turbines ◽  
Atmospheric Conditions ◽  
Layer Model ◽  
Boundary Layer Model

A two-dimensional iterative panel method and boundary layer model for bio-inspired multi-body wings

2014 ◽  
Author(s):  
Christopher J. Blower ◽  
Akash Dhruv ◽  
Adam M. Wickenheiser
Keyword(s):  
Boundary Layer ◽  
Panel Method ◽  
Two Dimensional ◽  
Layer Model ◽  
Boundary Layer Model ◽  
Multi Body

Application of a boundary-layer model to flow over an eolian dune

1985 ◽  
Vol 90 (D6) ◽  
pp. 10631-10640 ◽  
Author(s):  
John L. Walmsley ◽  
Alan D. Howard
Keyword(s):  
Boundary Layer ◽  
Layer Model ◽  
Boundary Layer Model

A logarithmic bottom boundary layer model for the unsteady and non-uniform swash flow

2021 ◽  
pp. 104048
Author(s):  
Fangfang Zhu ◽  
Nicholas Dodd ◽  
Riccardo Briganti ◽  
Magnus Larson ◽  
Jie Zhang
Keyword(s):  
Boundary Layer ◽  
Bottom Boundary Layer ◽  
Layer Model ◽  
Bottom Boundary ◽  
Boundary Layer Model

scholarly journals A boundary layer model for submarine hydrothermal heat flows at on-axis and near-axis regions

2009 ◽  
Vol 10 (12) ◽  
pp. n/a-n/a ◽  
Author(s):  
Kathleen L. Craft ◽  
Robert P. Lowell
Keyword(s):  
Boundary Layer ◽  
Layer Model ◽  
Heat Flows ◽  
Boundary Layer Model

scholarly journals Modeling of Losses Due to Inter-Laminar Short-Circuit Currents in Lamination Stacks

2013 ◽  
Vol 3 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Sahas Bikram Shah ◽  
Paavo Rasilo ◽  
Anouar Belahcen ◽  
Antero Arkkio
Keyword(s):  
Boundary Layer ◽  
Short Circuit ◽  
Tangential Component ◽  
Electrical Machines ◽  
Electrical Machine ◽  
Induced Current ◽  
Layer Model ◽  
Boundary Layer Model ◽  
Fine Mesh ◽  
Additional Losses

Abstract The cores of electrical machines are generally punched and laminated to reduce the eddy current losses. These manufacturing processes such as punching and cutting deform the electrical sheets and deteriorate its magnetic properties. Burrs are formed due to plastic deformation of electrical sheets. Burr formed due to punching on the edges of laminated sheets impairs the insulation of adjacent sheet and make random galvanic contacts during the pressing of stacked sheets. The effect of circulating current occurs if the burrs occur on the opposite edges of the stacks of laminated sheets and incase of bolted or wielded sheets, induced current return through it. This induced current causes the additional losses in electrical machine. The existence of surface current on the boundary between two insulated regions causes discontinuity of tangential component of magnetic field. Hence, based on this principle, the boundary layer model was developed to study the additional losses due to galvanic contacts formed by burred edges. The boundary layer model was then coupled with 2-D finite element vector potential formulation and compared with fine mesh layer model. Fine mesh layer model consists of finely space discretized 950028 second order triangular elements. The losses were computed from two models and were obtained similar at 50 Hz. The developed boundary layer model can be further used in electrical machines to study additional losses due to galvanic contacts at the edges of stator cores.

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