Modeling of Mixing Diesel-CNG in a Horizontal Pipe under the Influence of a Magnetic Field

Authors

  • Hasanain A. AbdulWahhab universiti Teknologi PETRONAS
  • A. Rashid A. Aziz universiti Teknologi PETRONAS
  • Hussain H. Al-Kayiem universiti Teknologi PETRONAS
  • Mohammad S. Nasif universiti Teknologi PETRONAS

Keywords:

Two-phase flow, Bubbly flow, Magnetic field, Volume-of-fluid (VOF)

Abstract

Modeling of Diesel-CNG bubbly flow with effecting magnetic field is presented in this paper. The incompressible Navier-Stokes equations have been used to solve the Diesel-CNG two phase flows in a horizontal pipeline. The simulation was carried out using ANSYS fluent software and the flow field discretization was achieved by the Volume-Of-Fluid method (VOF) technique. The interface between the gaseous and liquid phases was described by a phase field function VF, when the phase interface crosses a mesh element- 0 < VF < 1. The results showed that CNG bubbles tend to migrate toward the upper wall under buoyancy effect and these bubbles grow to a larger volume and expand vertically in the diesel flow before it breaks away with effecting magnetic field 0.4 to 0.8 Tesla, and the gas volume fraction values increased by increasing the magnetic intensity. The laminar behavior of the flow changed in the upper zone of the pipe to increasing gas volume fraction, while the axial diesel velocity decreased and the profiles tended to flatten with increasing the magnetic field strength. The numerical procedure was validated by comparing the computational results with experimental data reported in the literature and a good agreement was achieved.

References

Ki H. Level set method for two-phase flows under magnetic fields, Computer Physics Communications, 2010: pp. 999-1007.

AbdulWahhab, H.A., A.Aziz, A.R., Al-Kayiem, H.H., Nasif, M.S. Modeling of diesel/CNG mixing in a pre-injection chamber, 3rd International Conference of Mechanical Engineering Research (ICMER 2015), IOP Conference Series: Materials Science and Engineering 100 (2015) 012044.

Ekambara, K., Sanders, R.S., Nandakumar, K., Masliyah, J.H. CFD simulation of bubbly two-phase flow in horizontal pipes, Chemical Engineering Journal, 2008. 144: pp. 277–288.

Sussman, M.; and Smereka, J. A. Axisymmetric free boundary problems. Journal of Fluid Mechanics, 1997. 341: pp. 269-294.

Bhaga, D., Weber, M.E. Bubbles in viscous liquids: shapes, wakes and velocities, Journal of fluid Mechanics, 1981.105: pp. 61-85.

Ryskin, G., Leal, L.G. Numerical solution of free boundary problems in fluid mechanics, part 2, Buoyancy-driven motion of a gas bubble through a quiescent liquid, Journal of Fluid Mechanics, 1984.148: pp. 19-35.

Brunner, K., Chang, J.S. Flow regime transition under electric fields in horizontal two-phase flow. in proceedings, 15th IEEE Industry Applications Society Conference, 1980: pp. 1052-1058.

Brunner, K., Wan, P.T., Chang, J.S. Flow pattern maps for horizontal gas liquid two-phase flow under d.c. electric field. In Electrostatics, Institute of Physics Conference Series 66, 1983: pp. 215-220.

Osher, S., Sethian, J. A. Fronts propagating with curvature dependent speed: algorithms based on Hamilton-Jacobi formulations, Journal of Computational Physics, 1988. 79: pp. 12-49.

Ishimoto, J., Okubo, M., Kamiyama, S., Higashitani, M. Bubble behavior in magnetic fluid under a non-uniform magnetic field, International Journal of JSME, 1995. 38(3): pp. 382-387.

Hnat, J.G., Buckmaster, J.D. Spherical cap bubbles and skirt formation. The Physics of Fluids, 1976.19: pp. 182-194.

Rahim, A. R. Design and simulate mixing of compressed natural gas with air in a mixing device, Malaysian Technical Universities Conference on Engineering and Technology. Perlis, 2008. 2: pp. 99-104.

Miao, X., Lucas, D., Ren, Z., Eckert, S., Gerbeth, G. Numerical modeling of bubble-driven liquid metal flows with external static magnetic field, International Journal of Multiphase Flow, 2013. 48: pp. 32-45.

Gardner, L., Moon, F.G. The relationship between electrical conductivity and temperature of aviation turbine fuels containing static dissipator additives. Division of Mechanical Report. 1983/10, National Research Council Canada.

Egúsquiza, J.C., Braga, S.L., Braga, C.V.M. Performance and gaseous emissions characteristics of a natural gas/diesel dual fuel turbocharged and after cooled engine, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2008. 31(2): pp. 166-173.

Fern´andez, D., Martine, M., Meagher, A., Mobius, M.E., Coey, J.M.D. Stabilizing effect of a magnetic field on a gas bubble produced at a microelectrode, Journal Electrochemistry Communications, 2012: pp. 1-13.

Kocamustafaogullari, G., Wang, Z. An experimental study on local interfacial parameters in a horizontal bubbly two-phase flow, International Journal Multiphase Flow, 1991. 17: pp. 553–572.

Kocamustafaogullari, G., Huang, W.D. Internal structure and interfacial velocity development for bubbly two-phase flow, Nuclear Engineering and Design, 1994. 151: pp. 79–101.

Iskandrani, A., Kojasoy, G. Local void fraction and velocity field description in horizontal bubbly flow, Nuclear Engineering and Design, 2001. 204: pp. 117–128.

Mark, S., Zhi, Y., Lynn, G., Michael, L., Derek, L., Benedict, N. SPRITE MRI of bubbly flow in a horizontal pipe, Journal of Magnetic Resonance, 2009. 199: pp. 126-135.

Malekzadeh, A., Heydarinasab, A., Jahangiri, M. Magnetic field effect on laminar heat transfer in a pipe for thermal entry region, Journal of Mechanical Science and Technology, 2011. 25(4): pp. 877-884.

Downloads

Published

2016-08-15

How to Cite

AbdulWahhab, H. A., Aziz, A. R. A., Al-Kayiem, H. H., & Nasif, M. S. (2016). Modeling of Mixing Diesel-CNG in a Horizontal Pipe under the Influence of a Magnetic Field. Asian Journal of Applied Sciences, 4(4). Retrieved from https://ajouronline.com/index.php/AJAS/article/view/3755

Issue

Section

Articles