Fiber Orientation and Rheology Behavior of the Laminar Suspension Flow through a 2-D Curved Expansion Duct

• Autorzy: Zhang Q. , Tian F. , Shi W. , Gao X , Zhang D.

Warianty tytułu

PL

Właściwości reologiczne laminarnego przepływu pola przez kanał zawieszenia 2D

• Języki publikacji: EN

Abstrakty

EN

By coupling the fiber extra stress into the laminar Newtonian flow equations, the fiber orientation and the fiber suspension rheology in a 2D curved expansion duct is numerically investigated. The orientation distribution probability function is numerically solved to obtain the bulk orientation distributions and the extra stress distributions. The results show that the overall distribution of the flow field parameters, such as velocity, pressure have not been significantly affected in the most regions of the duct. But for the shear stress and normal stress difference, the non-equilibrium is significant. In the inlet region, the fibers rotate frequently due to the nonuniform flow shear effects, the orientation becomes more random and are less aligned with the local streamlines. But in the downstream region, with flow shear becomes uniform, the non-equilibrium is less obvious. In addition, with the fiber extra viscosity increasing, the shear stress and normal stress difference increase correspondingly.

PL

Przeanalizowano numerycznie orientację włókna i naprężenia zawieszenia w zastosowaniach do reologii. Stwierdzono, że takie parametry jak ciśnienie i szybkość przepływu nie decydują o parametrach kanału. Natomiast istotny wpływ mają naprężenia.

Słowa kluczowe

EN

fiber suspension; stress; fiber orientation

PL

reologia; orientacja włókien; naprężenie

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2012
• Tom: R. 88, nr 9b
• Strony: 70--74
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Zhang Q.

• Research Center of Fluid Machinery Engineering and Technology, Jiangsu University

autor

Tian F.

• Research Center of Fluid Machinery Engineering and Technology, Jiangsu University

autor

Shi W.

• Research Center of Fluid Machinery Engineering and Technology, Jiangsu University

autor

Gao X

• Research Center of Fluid Machinery Engineering and Technology, Jiangsu University

autor

Zhang D.

• Research Center of Fluid Machinery Engineering and Technology, Jiangsu University

Bibliografia

• [1] Jeffery,G.B., The Motion of Ellipsoidal Particles Immersed in a Viscous Fluid. Proc. R. Soc. Lond. A, 1922, 102:161-179
• [2] Givler,R.C., Crochet,M.J., Pipes,R.B., Numerical Prediction of Fiber Orientation in Dilute Suspensions, J. Compos. Mater., 1983, 17: 331-343.
• [3] Jackson,W.C., Folgar,F., Tucker,C.L., Prediction and Control of Fiber Orientation in Molded Parts, Polymer Blends and Composites in Multiphase Systems,ACS, 1984, Washington: 279-299.
• [4] Folgar,F., Tucker, C.L. , Orientation Behavior of fibers in Concentrated Suspensions, Transport Phenomena in Material Processing, ASME, 1983, New York:105-115.
• [5] Jackson,W.C., Advani, S.G.,Tucker, C.L., Predicting the Orientation of Short Fibers in Thin Compression Moldings, J. Compos. Mater., 1986, 20: 539-557.
• [6] Advani, S.G., Tucker, C.L., The Use of Tensor to Describe and Predict Fiber Orientation in Short Fiber Composites, J. Rheol., 1987, 31(8): 751-784.
• [7] Lin,J.Z.,Zhang,Q.H., Zhang, K., Rheological Property of Fiber Suspensions Flowing through a Curved Expansion Duct, Poly. Eng. Sci., 2010, 50(10): 1994-2003.
• [8] Kamal, M.R., Mutel, A.T., The Prediction of Flow and Orientation Behavior of Short Fiber Reinforced Melts in Simple Flow Systems,Polym. Compos., 1989, 10(5):337-343.
• [9] Chiba, K., Nakamura, K., Numerical Solution of Fiber Suspension Flow Through a Complex Channel, J. Non- Newt.Fluid Mech., 1998, 78(2-3):167-185.
• [10] Lipscomb, G.G., Denn, M.M., The Flow of Fiber Suspension in Complex Geometries, J. Non-Newt.Fluid Mech., 1988, 26: 297-325.
• [11] Chiba,K., Yasuda,K., Nakamura,K., Numerical Solution of Fiber Suspension Flow through a Parallel Plate Channel by Coupling Flow Field with Fiber Orientation Distribution. J. Non- Newt.Fluid Mech., 2001, 99(2-3),145-157.
• [12] Zhang,Q.H., Lin,J.Z., Wang,C.X., Zhang,W.F., Orientation Distribution of Fibers Immersed in a Curved Expansion Duct, Int. J. Nonlinear Sci. Num. Sim., 2009, 10(11-12),1585-1594.
• [13] Zhang,Q.H., Lin,J.Z., Orientation Distribution and Rheological Properties of Fiber Suspensions Flowing through Curved Expansion and Rotating Ducts, J. Hydrodynamics, Ser.B, 2010, 22(5),920-925.
• [14] Batchelor, G.K., The Stress System in a Suspension of Force-Free Particles, J.Fluid Mech.,1970, 41: 545-570.