Smoothed particle hydrodynamics (SPH) has become increasingly important during recent decades. Its meshless nature, inherent representation of convective transport and ability to simulate free surface flows make SPH particularly promising with regard to simulations of industrial mixing devices for high-viscous fluids, which often have complex rotating geometries and partially filled regions (e.g., twin-screw extruders). However, incorporating the required geometries remains a challenge in SPH since the most obvious and most common ways to model solid walls are based on particles (i.e., boundary particles and ghost particles), which leads to complications with arbitrarily-curved wall surfaces. To overcome this problem, we developed a systematic method for determining an adequate interaction between SPH particles and a continuous wall surface based on the underlying SPH equations. We tested our new approach by using the open-source particle simulator "LIGGGHTS" and comparing the velocity profiles to analytical solutions and SPH simulations with boundary particles. Finally, we followed the evolution of a tracer in a twin-cam mixer during the rotation, which was experimentally and numerically studied by several other authors, and ascertained good agreement with our results. This supports the validity of our newly-developed wall interaction method, which constitutes a step forward in SPH simulations of complex geometries. (C) 2014 Elsevier B.V. All rights reserved.
机构:
Peking Univ, Coll Engn, Beijing 100871, Peoples R China
Peking Univ, Ocean Res Inst, Beijing 100871, Peoples R China
Peking Univ, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R ChinaPeking Univ, Coll Engn, Beijing 100871, Peoples R China
Liu, Mou-Bin
Li, Shang-ming
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CAEP, Inst Syst Engn, Mianyang 621900, Peoples R ChinaPeking Univ, Coll Engn, Beijing 100871, Peoples R China
机构:
Department of Mechanics, Institute of Fluid Engineering, Zhejiang University, HangzhouDepartment of Mechanics, Institute of Fluid Engineering, Zhejiang University, Hangzhou
Xiong H.
Chen L.
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Department of Mechanics, Institute of Fluid Engineering, Zhejiang University, HangzhouDepartment of Mechanics, Institute of Fluid Engineering, Zhejiang University, Hangzhou
Chen L.
Lin J.
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Department of Mechanics, Institute of Fluid Engineering, Zhejiang University, HangzhouDepartment of Mechanics, Institute of Fluid Engineering, Zhejiang University, Hangzhou
机构:
Georgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
Emory Univ, Atlanta, GA 30322 USAGeorgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
Caballero, Andres
Mao, Wenbin
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Georgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
Emory Univ, Atlanta, GA 30322 USAGeorgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
Mao, Wenbin
Liang, Liang
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Georgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
Emory Univ, Atlanta, GA 30322 USAGeorgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
Liang, Liang
Oshinski, John
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Georgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
Emory Univ, Atlanta, GA 30322 USA
Emory Univ, Dept Radiol & Imaging Sci, Atlanta, GA 30322 USAGeorgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
Oshinski, John
Primiano, Charles
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Hartford Hosp, Cardiol Dept, Hartford, CT 06115 USAGeorgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
Primiano, Charles
McKay, Raymond
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Hartford Hosp, Cardiol Dept, Hartford, CT 06115 USAGeorgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
McKay, Raymond
Kodali, Susheel
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Columbia Univ, Med Ctr, Struct Heart & Valve Ctr, New York, NY USAGeorgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
Kodali, Susheel
Sun, Wei
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Georgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
Emory Univ, Atlanta, GA 30322 USAGeorgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA