Numerical Study of Microscale Gas Flow-Separation Using Explicit Finite Volume Method
Pressure driven microscale gas flow-separation has
been investigated by solving the compressible Navier-Stokes (NS)
system of equations. A two dimensional explicit finite volume (FV)
compressible flow solver has been developed using modified
advection upwind splitting methods (AUSM+) with no-slip/first
order Maxwell-s velocity slip conditions to predict the flowseparation
behavior in microdimensions. The effects of scale-factor
of the flow geometry and gas species on the microscale gas flowseparation
have been studied in this work. The intensity of flowseparation
gets reduced with the decrease in scale of the flow
geometry. In reduced dimension, flow-separation may not at all be
present under similar flow conditions compared to the larger flow
geometry. The flow-separation patterns greatly depend on the
properties of the medium under similar flow conditions.
[1] P. Y. Tzeng and P. H. Chen, "Numerical visualization of gaseous microchannel
flow in transition regime", in Proc. of PSFVIP-4, Chamonix,
France, 2003.
[2] R. Raju and S. Roy, "Hydrodynamic study of high speed flow and heat
transfer through a microchannel", J. Thermophys. Heat Transfer, vol.
19, pp.106-113, 2005.
[3] D. Jie et al., "Navier-Stokes simulation of gas flow in microdevices", J.
Micromech. Microeng., vol. 10, pp.372-379, 2000.
[4] M. J. McNenly et al., "Slip model performance for micro-scale gas
flows", in Proc. 36th AIAA Thermophysics Conf., AIAA 2003-4050,
pp.1-9, 2003.
[5] F. Yan and B. Farouk, "Computation of fluid flow and heat transfer in
ducts using the direct simulation Monte Carlo method", J. of Heat
Transfer, vol. 124, pp. 609-616, 2002.
[6] A. Chaudhuri et al., "Finite volume simulation of supersonic to
hypersonic gas flow and heat transfer through microchannel", Chem.
Eng. Technol., vol. 30 no. 1, pp. 41-45, 2007.
[7] A. Chaudhuri et al., "Numerical study of fluid flow and heat transfer in
partially heated microchannel using explicit finite volume method",
Chem. Eng. Technol., vol. 30 no.4, pp.425-430, 2007.
[8] F. Yan and B. Farouk, "Numerical simulation of gas flow and mixing in
a microchannel using the direct simulation Monte Carlo method",
Microscale Thermophysical Eng., vol. 6, pp. 235-251, 2002.
[9] H. Xue and S. Chen, "DSMC simulation of microscale backward-facing
step flow", Microscale Thermophysical Eng., vol.7, pp. 69-86, 2003.
[10] Y. W. Lee and M. Wong, "Pressure loss in construction microchannels",
J. MEMS, vol. 11, pp. 236-244, 2002.
[11] S. Y. K. Lee et al., "Gas flow in microchannels with bends", J.
Micromech. Microeng., vol. 11, pp. 635-644, 2001.
[12] A. Chaudhuri et al., "Numerical study of micro-scale gas flow using
finite volume method", J. of Phys. Conf. Series, vol. 34, pp. 291-297,
2006.
[13] A. Chaudhuri et al., "Finite volume simulation of high speed
combustion of acetylene-air mixture in microchannels", Chem. Eng.
Technol., vol. 30, no.5, pp. 615-620, 2007.
[14] A. Chaudhuri et al., "Numerical study of flame acceleration in
microchannel", NanoTech 2007 Conf., vol. 3, Chap. 3, pp. 149-152,
2007.
[15] M. S. Liou, C. J. Steffen(Jr.), "A new flux splitting method", J. Comp.
Phys.,vol. 107, pp. 23-39, 1993.
[16] M. S. Liou, "A sequel to AUSM: AUSM+", J. Comp. Phys., vol. 129,
pp. 364-382, 1996.
[1] P. Y. Tzeng and P. H. Chen, "Numerical visualization of gaseous microchannel
flow in transition regime", in Proc. of PSFVIP-4, Chamonix,
France, 2003.
[2] R. Raju and S. Roy, "Hydrodynamic study of high speed flow and heat
transfer through a microchannel", J. Thermophys. Heat Transfer, vol.
19, pp.106-113, 2005.
[3] D. Jie et al., "Navier-Stokes simulation of gas flow in microdevices", J.
Micromech. Microeng., vol. 10, pp.372-379, 2000.
[4] M. J. McNenly et al., "Slip model performance for micro-scale gas
flows", in Proc. 36th AIAA Thermophysics Conf., AIAA 2003-4050,
pp.1-9, 2003.
[5] F. Yan and B. Farouk, "Computation of fluid flow and heat transfer in
ducts using the direct simulation Monte Carlo method", J. of Heat
Transfer, vol. 124, pp. 609-616, 2002.
[6] A. Chaudhuri et al., "Finite volume simulation of supersonic to
hypersonic gas flow and heat transfer through microchannel", Chem.
Eng. Technol., vol. 30 no. 1, pp. 41-45, 2007.
[7] A. Chaudhuri et al., "Numerical study of fluid flow and heat transfer in
partially heated microchannel using explicit finite volume method",
Chem. Eng. Technol., vol. 30 no.4, pp.425-430, 2007.
[8] F. Yan and B. Farouk, "Numerical simulation of gas flow and mixing in
a microchannel using the direct simulation Monte Carlo method",
Microscale Thermophysical Eng., vol. 6, pp. 235-251, 2002.
[9] H. Xue and S. Chen, "DSMC simulation of microscale backward-facing
step flow", Microscale Thermophysical Eng., vol.7, pp. 69-86, 2003.
[10] Y. W. Lee and M. Wong, "Pressure loss in construction microchannels",
J. MEMS, vol. 11, pp. 236-244, 2002.
[11] S. Y. K. Lee et al., "Gas flow in microchannels with bends", J.
Micromech. Microeng., vol. 11, pp. 635-644, 2001.
[12] A. Chaudhuri et al., "Numerical study of micro-scale gas flow using
finite volume method", J. of Phys. Conf. Series, vol. 34, pp. 291-297,
2006.
[13] A. Chaudhuri et al., "Finite volume simulation of high speed
combustion of acetylene-air mixture in microchannels", Chem. Eng.
Technol., vol. 30, no.5, pp. 615-620, 2007.
[14] A. Chaudhuri et al., "Numerical study of flame acceleration in
microchannel", NanoTech 2007 Conf., vol. 3, Chap. 3, pp. 149-152,
2007.
[15] M. S. Liou, C. J. Steffen(Jr.), "A new flux splitting method", J. Comp.
Phys.,vol. 107, pp. 23-39, 1993.
[16] M. S. Liou, "A sequel to AUSM: AUSM+", J. Comp. Phys., vol. 129,
pp. 364-382, 1996.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:53617", author = "A. Chaudhuri and C. Guha and T. K. Dutta", title = "Numerical Study of Microscale Gas Flow-Separation Using Explicit Finite Volume Method", abstract = "Pressure driven microscale gas flow-separation has
been investigated by solving the compressible Navier-Stokes (NS)
system of equations. A two dimensional explicit finite volume (FV)
compressible flow solver has been developed using modified
advection upwind splitting methods (AUSM+) with no-slip/first
order Maxwell-s velocity slip conditions to predict the flowseparation
behavior in microdimensions. The effects of scale-factor
of the flow geometry and gas species on the microscale gas flowseparation
have been studied in this work. The intensity of flowseparation
gets reduced with the decrease in scale of the flow
geometry. In reduced dimension, flow-separation may not at all be
present under similar flow conditions compared to the larger flow
geometry. The flow-separation patterns greatly depend on the
properties of the medium under similar flow conditions.", keywords = "AUSM+, FVM, Flow-separation, Microflow.", volume = "2", number = "10", pages = "227-4", }