Modeling and Optimization of Nozzle Design in Planar Flow Melt Spinning

1999 ◽  
Author(s):  
J. S.-J. Chen ◽  
A. A. Tseng
Keyword(s):  
Melt Spinning ◽  
Experimental Studies ◽  
Three Dimensional ◽  
Flow Distribution ◽  
Cfd Modeling ◽  
Nozzle Design ◽  
Planar Flow ◽  
Injection Angle ◽  
Image Velocimetry ◽  
Spinning Process

Abstract Numerical and experimental studies were performed to analyze a planar flow melt spinning process (PFMS) with a focus on the optimal nozzle design. Three-dimensional computational fluid dynamics (CFD) modeling using FIDAP was carried out to analyze the flow distribution in various nozzle shapes including rectangular, trapezoidal, and hemispherical edges. A laser-based Particle Image Velocimetry (PIV) system was developed to measure the velocity field at the nozzle exit. The CFD modeling results were validated by the PIV measurements. It was found that a converging nozzle with diverging edges along with a 30°-injection angle provided the best design. The optimized nozzle was used to produce high quality ribbons as characterized by the surface roughness measurements and micrograph techniques.

Effect of Crucible Parameters on Planar Flow Melt Spinning Process

2015 ◽  
Vol 68 (6) ◽  
pp. 1125-1129 ◽  
Author(s):  
M. Swaroopa ◽  
L. Venu Gopal ◽  
T. Kishen Kumar Reddy ◽  
B. Majumdar
Keyword(s):  
Melt Spinning ◽  
Planar Flow ◽  
Spinning Process

Issues on Puddle Formation During Rapid Solidification of Fe–Si–B–Nb–Cu Alloy Using Planar Flow Melt Spinning Process

2012 ◽  
Vol 65 (6) ◽  
pp. 841-847 ◽  
Author(s):  
B. Majumdar ◽  
M. Sowjanya ◽  
M. Srinivas ◽  
D. A. Babu ◽  
T. Kishen K. Reddy
Keyword(s):  
Rapid Solidification ◽  
Melt Spinning ◽  
Planar Flow ◽  
Cu Alloy ◽  
Spinning Process

scholarly journals Transient behavior of the planar-flow melt spinning process

2010 ◽  
Vol 65 (10) ◽  
pp. 3249-3259 ◽  
Author(s):  
E.A. Theisen ◽  
M.J. Davis ◽  
S.J. Weinstein ◽  
P.H. Steen
Keyword(s):  
Melt Spinning ◽  
Transient Behavior ◽  
Planar Flow ◽  
Spinning Process

Influence of Angle of Inclination of the Crucible on Puddle Formation and Ribbon Thickness during Planar Flow Melt Spinning Process

2018 ◽  
Vol 1 (1) ◽  
pp. 279-285 ◽  
Author(s):  
Sowjanya Madireddi
Keyword(s):  
Melt Spinning ◽  
Ribbon Thickness ◽  
Wheel Surface ◽  
Planar Flow ◽  
Ideal Position ◽  
Quality Product ◽  
Spinning Process ◽  
Transformer Core ◽  
The Ideal

Planar flow melt spinning process is widely used to manufacture amorphous ribbons for transformer core applications. The position of the crucible above cooling wheel for melt ejection in the realistic production conditions is crucial to producing the higher quality product. The quality of the product depends on the thickness and defect-free state of the ribbon. Puddle formation plays a significant role in the quality of the ribbon. As the experimental investigation is expensive and time consuming a numerical model is used to investigate the effect of clockwise and counter-clockwise inclination of the crucible on puddle formation and ribbon thickness. The thickness increases by 62.8 % and 111.5% with an augment in inclination angle from 0o to 5.4o in counter-clockwise and clockwise directions respectively. Limiting angle of inclination to avoid non-contact zone or cavity in the puddle at the nozzle wall is around 2o to 3o to obtain a higher quality ribbon. This limit can increase up to 3o to 4o for higher wheel speeds. The ideal position of the crucible is perpendicular to the wheel surface. Otherwise, the limiting angle of inclination to produce higher quality ribbon is, counter-clockwise with an optimum inclination of not more than 2 degrees.

Simulation of Initial Ribbon Formation during Planar Flow Melt Spinning Process

2013 ◽  
Vol 446-447 ◽  
pp. 352-355 ◽  
Author(s):  
M. Sowjanya ◽  
T. Kishen Kumar Reddy ◽  
B. Srivastha ◽  
B. Majumdar
Keyword(s):  
Melt Spinning ◽  
Solidification Process ◽  
Air Entrainment ◽  
Computational Domain ◽  
Two Phase ◽  
Planar Flow ◽  
Spinning Process ◽  
Dependent Model ◽  
Energy And Momentum ◽  
Transformer Core

Planar flow melt spinning (PFMS) is a rapid solidification process to produce amorphous ribbons for transformer core applications. The present study deals with the development of 3dimensional time-dependent model, for the numerical simulation of ribbon formation during the PFMS process. Space between nozzle wall and the rotating wheel is considered as the computational domain. Volume of fluid technique is applied along with energy and momentum equations to simulate the two phase flow in the domain. Effect of ejection temperature of the melt is investigated during ribbon formation. Ribbon patterns like dimple and continuous are obtained for different ejection temperatures. Phenomenon of air entrainment which leads to dimple pattern is discussed. Vacuum conditions are suggested to avoid air entrainment.

Sign in / Sign up

Export Citation Format

Share Document