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A STUDY ON FLOW IN A SLIT NOZZLE FOR DISPENSING A LOW-VISCOSITY SOLUTION OF SINGLE-WALLED CARBON NANOTUBES  

Shon, B.C (금오공과대학교 대학원 기계공학과, STX 엔파코)
Kwak, H.S. (금오공과대학교 기계공학부)
Lee, S.H. ((주)탐엔지니어링, 기술연구소)
Publication Information
Journal of computational fluids engineering / v.14, no.1, 2009 , pp. 78-85 More about this Journal
Abstract
A combined theoretical and numerical study is conducted to design a slit nozzle for large-area liquid coating. The objectives are to guarantee the uniformity in the injected flow and to provide the capability of explicit control of flow rate. The woking fluid is a dilute aqueous solution containing single-walled carbon nanotubes and its low viscosity and the presence of dispersed materials pose technical hurdles. A theoretical analysis leads to a guideline for the geometric design of a slit nozzle. The CFD-based numerical experiment is employed as a verification tool. A new flow passage unit, connected to the nozzle chamber, is proposed to permit the control of flow rate by using the commodity pressurizer. The numerical results confirm the feasibility of this idea. The optimal geometry of internal structure of the nozzle has been searched for numerically and the related issues are discussed.
Keywords
Large-Area Thin-Film Coating; Slit Nozzle; Computational Design Analysis; Low-Viscosity Fluid; Carbon Nanotubcs Solution;
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