0
Research Papers: Fundamental Issues and Canonical Flows

Investigation of Flow Dynamics Over Transitional-Type Microcavity

[+] Author and Article Information
Paulius Vilkinis

Laboratory of Heat-Equipment Research
and Testing,
Lithuanian Energy Institute,
Breslaujos Street 3,
Kaunas LT 44403, Lithuania
e-mail: paulius.vilkinis@lei.lt

Nerijus Pedišius

Laboratory of Heat-Equipment Research
and Testing,
Lithuanian Energy Institute,
Breslaujos Street 3,
Kaunas LT 44403, Lithuania
e-mail: nerijus.pedisius@lei.lt

Mantas Valantinavičius

Laboratory of Heat-Equipment Research
and Testing,
Lithuanian Energy Institute,
Breslaujos Street 3,
Kaunas LT 44403, Lithuania
e-mail: mantas.valantinavicius@lei.lt

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received September 27, 2017; final manuscript received January 4, 2018; published online March 13, 2018. Assoc. Editor: Pierre E. Sullivan.

J. Fluids Eng 140(7), 071203 (Mar 13, 2018) (7 pages) Paper No: FE-17-1617; doi: 10.1115/1.4039159 History: Received September 27, 2017; Revised January 04, 2018

Flow over a transitional-type cavity in microchannels is studied using a microparticle image velocimetry system (μPIV) and commercially available computational fluid dynamics (CFD) software in laminar, transitional, and turbulent flow regimes. According to experimental results, in the transitional-type cavity (L/h1 = 10) and under laminar flow in the channel, the recirculation zone behind the backward-facing step stretches linearly with ReDh until the reattachment point reaches the middle of the cavity at xr/L = (0.5 to 0.6). With further increase in ReDh, the forward-facing step lifts the reattaching flow from the bottom of the cavity and stagnant recirculation flow fills the entire space of the cavity. Flow reattachment to the bottom of the cavity is again observed only after transition to the turbulent flow regime in the channel. Reynolds-averaged Navier–Stokes (RANS) equations and large eddy simulation (LES) results revealed changes in vortex topology, with the flow regime changing from laminar to turbulent. During the turbulent flow regime in the recirculation zone, periodically recurring vortex systems are formed. Experimental and computational results have a good qualitative agreement regarding the changes in the flow topology. However, the results of numerical simulations based on RANS equations and the Reynolds-stress-baseline turbulence model (RSM-BSL), show that computed reattachment length values overestimate the experimentally obtained values. The RSM-BSL model underestimates the turbulent kinetic energy intensity, generated by flow separation phenomena, on the stage of transitional flow regime.

FIGURES IN THIS ARTICLE
<>
Copyright © 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Kherbeet, A. S. , Mohammed, H. A. , Munisamy, K. M. , and Salman, B. H. , 2014, “ The Effect of Step Height of Microscale Backward-Facing Step on Mixed Convection Nanofluid Flow and Heat Transfer Characteristics,” Int. J. Heat Mass Transfer, 68, pp. 554–566. [CrossRef]
Velazquez, A. , Arias, J. R. , and Mendez, B. , 2008, “ Laminar Heat Transfer Enhancement Downstream of a Backward Facing Step by Using a Pulsating Flow,” Int. J. Heat Mass Transfer, 51(7–8), pp. 2075–2089. [CrossRef]
D'Adamo, J. , Sosa, R. , and Artamo, G. , 2014, “ Active Control of a Backward Facing Step Flow With Plasma Actuators,” ASME J. Fluids Eng., 136(12), p. 121105. [CrossRef]
Bernard, N. , Pons-Prats, J. , Periaux, J. , Bugeda, G. , Bonnet, G. , Bonnet, J. P. , and Moreau, E. , 2015, “ Multi-Input Genetic Algorithm for Experimental Optimization of the Reattachment Downstream of a Backward-Facing Step With Surface Plasma Actuator,” AIAA Paper No. 2015-2957.
Pouryoussefi, S. G. , Mirzaei, M. , and Hajipour, M. , 2015, “ Experimental Study of Separation Bubble Control Behind a Backward-Facing Step Using Plasma Actuators,” Acta Mech., 226(4), p. 1153. [CrossRef]
Herman, C. , and Kang, E. , 2002, “ Heat Transfer Enhancement in a Grooved Channel With Curved Vanes,” Int. J. Heat Mass Transfer, 45(18), pp. 3741–3757. [CrossRef]
Haddadi, H. , and Carlo, D. D. , 2017, “ Inertial Flow of a Dilute Suspension Over Cavities in a Microchannel,” J. Fluid Mech., 811, pp. 436–467. [CrossRef]
Jung, J. , Kuo, C.-J. , Peles, Y. , and Amitay, M. , 2012, “ The Flow Field Around a Micropillar Confined in a Microchannel,” Int. J. Heat Fluid Flow, 36, pp. 118–132. [CrossRef]
Manbachi, A. , Shrivastava, S. , Cioffi, M. , Chung, B. G. , Moretti, M. , Demirci, U. , Yliperttula, M. , and Khademhosseini, A. , 2008, “ Microcirculation Within Grooved Substrates Regulates Cell Positioning and Cell Docking Inside Microfluidic Channels,” Lab Chip, 8(5), pp. 747–754. [CrossRef] [PubMed]
Khabiry, M. , Chung, B. G. , Hancock, M. J. , Soundararajan, H. C. , Du, Y. , Cropek, D. , Lee, W. G. , and Khademhosseini, A. , 2009, “ Cell Docking in Double Grooves in a Microfluidic Channel,” Small, 5(10), pp. 1186–1194. [PubMed]
Jang, Y.-H. , Kwon, C. H. , Kim, S. B. , Selimovic, S. , Sim, W.-Y. , Bae, H. , and Khademhosseini, A. , 2011, “ Deep Wells Integrated With Microfluidic Valves for Stable Docking and Storage of Cells,” Biotechnol. J., 6(2), pp. 156–164. [CrossRef] [PubMed]
Cheng, W. C. , Liu, C.-H. , and Leung, D. Y. C. , 2009, “ On the Correlation of Air and Pollutant Exchange for Street Canyons in Combined Wind-Buoyancy-Driven Flow,” Atmos. Environ., 43(24), pp. 3682–3690. [CrossRef]
Toja-Silva, F. , Peralta, C. , Lopez-Garcia, O. , Navarro, J. , and Cruz, I. , 2015, “ Effect of Roof-Mounted Solar Panels on the Wind Energy Exploitation on High-Rise Buildings,” J. Wind Eng. Ind. Aerodyn., 145, pp. 123–138. [CrossRef]
Moroney, R. N. , Leitl, B. M. , Rafailidis, S. , and Schatzmann, M. , 1999, “ Wind-Tunnel and Numerical Modelling of Flow and Dispersion About Several Building Shapes,” J. Wind Eng. Ind. Aerodyn., 81(1–3), pp. 333–345. [CrossRef]
Xie, X. , Liu, C.-H. , and Leung, D. Y. C. , 2007, “ Impact of Building Facades and Ground Heating on Wind Flow and Pollutant Transport in Street Canyons,” Atmos. Environ., 41(39), pp. 9030–9049. [CrossRef]
Back, L. , and Roschke, E. , 1972, “ Shear-Layer Flow Regimes and Wave Instabilities and Reattachment Lengths Downstream of an Abrupt Circular Channel Expansion,” ASME J. Appl. Mech., 39(3), pp. 677–681. [CrossRef]
Gong, S. , Liu, R. , Chou, F. , and Chiang, A. , 1996, “ Experiment and Simulation of the Recirculation Flow in a CVD Reactor for Monolithic Materials,” Exp. Thermal Fluid Sci., 12(1), pp. 45–51. [CrossRef]
Cantwell, C. D. , Barkley, D. , and Blackburn, H. M. , 2010, “ Transient Growth Analysis of Flow Through a Sudden Expansion in a Circular Pipe,” Phys. Fluids, 22(3), p. 034101. [CrossRef]
Armaly, B. F. , Durst, F. , Pereira, C. F. , and Schonung, B. , 1983, “ Experimental and Theoretical Investigation of Backward-Facing Step Flow,” J. Fluid Mech., 127(1), pp. 473–496. [CrossRef]
Fernando, J. , Kriegseis, J. , and Rival, D. , 2012, “ On the Separated Region Behind a Confined Backward-Facing Step,” 20th Annual Conference of the CFD Society of Canada (CFDSC), Canmore, AB, Canada, May 9–11. http://www.sinmec.ufsc.br/~dihlmann/MALISKA/proceedings_cfd_society_of_canada_conference_may_2012/papers/Fernando_Kriegseis_Rival.pdf
Goharzadeh, A. , and Rodgers, P. , 2009, “ Experimental Measurement of Laminar Axisymmetric Flow Through Confined Annular Geometries With Sudden Inward Expansion,” ASME J. Fluids Eng., 131(12), p. 124501. [CrossRef]
Saleel, C. A. , Shaija, A. , and Jayaraj, S. , 2013, “ On Simulation of Backward Facing Step Flow Using Immersed Boundary Method,” American J. Fluid Dyn., 3(2), pp. 9–19.
Spazzini, P. G. , Iuso, G. , Onorato, M. , Zurlo, N. , and Di Cicca, G. M. , 2001, “ Unsteady Behavior of Back-Facing Step Flow,” Exp. Fluids, 30(5), pp. 551–561. [CrossRef]
Pedišius, A. , and Šlančiauskas, A. , 1995, Heat Transfer Augmentation in Turbulent Flows, Begell House, New York.
Carvalho, M. , Durst, F. , and Pereira, J. , 1987, “ Predictions and Measurements of Laminar Flow Over Two-Dimensional Obstacles,” Appl. Math. Model., 11(1), pp. 23–34. [CrossRef]
Wee, D. , Yi, T. , Annaswamy, A. , and Ghoniem, F. A. , 2004, “ Self-Sustained Oscillations and Vortex Shedding in Backward-Facing Step Flows: Simulation and Linear Instability Analysis,” Phys. Fluids, 16(9), pp. 3361–3371. [CrossRef]
Henderson, J. , Badcock, K. , and Richards, B. E. , 2000, “ Subsonic and Transonic Transitional Cavity Flows,” AIAA Paper No. 2000-1966.
Coleman, S. E. , Nikora, V. , Mclean, S. R. , and Schlicke, E. , 2007, “ Spatially Averaged Turbulent Flow Over Square Ribs,” J. Eng. Mech., 133(2), pp. 194–204. [CrossRef]
Leonardi, S. , Orlandi, P. , Smalley, R. J. , Djenidi, L. , and Antonia, R. A. , 2003, “ Direct Numerical Simulations of Turbulent Channel Flow With Transverse Square Bars on One Wall,” J. Fluid Mech., 491, pp. 229–238. [CrossRef]
Charwat, A. , 1961, “ An Investigation of Separated Flows—Part I: The Pressure Field,” J. Aerosp. Sci., 28(6), pp. 457–470. [CrossRef]
Plentovich, E. B. , `Stallings, R. L. , Jr., and Tracy, M. B. , 1993, “ Experimental Cavity Pressure Measurements at Subsonic and Transonic Speeds, Static-Pressure Results,” NASA Langley Research Center, Hampton, VA, Technical Report No. NASA-TP-3358. https://ntrs.nasa.gov/search.jsp?R=19940019991
Zhang, J. , Morishita, E. , Okunuki, T. , and Itoh, H. , 2002, “ Experimental Investigation on the Mechanism of Flow-Type Changes in Supersonic Cavity Flows,” Trans. Jpn. Soc. Aeronaut. Apace Sci., 45(149), pp. 170–179. [CrossRef]
Esteve, M. , Reulet, P. , and Millan, P. , 2000, “ Flow Field Characterisation Within a Rectangular Cavity,” Tenth International Symposium Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, July 10–13. http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2000/papers/pdf/14_2.pdf
Gurcan, F. , 2003, “ Streamline Topologies in Stokes Flow Within Lid-Driven Cavities,” Theor. Comput. Fluid Dyn., 17(19), pp. 19–30. [CrossRef]
Dejoan, A. , Jang, Y.-A. , and Leschziner, M. A. , 2004, “ Comparative LES and Unsteady RANS Computations for a Periodically-Perturbed Separated Flow Over a Backward-Facing Step,” ASME J. Fluids Eng., 127(5), pp. 872–878. [CrossRef]
Chiang, T. P. , Sheu, T. W. H. , and Fang, C. C. , 1999, “ Numerical Investigation Vortical Evolution a Backward-Facing Step Expansion Flow,” Appl. Math. Model., 23(12), pp. 915–932. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

Dependence of the recirculation zone length on Re from various studies in different geometries: axisymmetric expansion (curves 1–3), backward-facing step (curves 4–7 and 10), obstacles (curves 8–9). 1—[16], 2—[17], 3—[18], 4—[20], 5—[21], 6—[22], 7—[23], 8—[24], 9—[25], 10—[19]. Note: Re is determined according to characteristic geometric parameters used by the authors.

Grahic Jump Location
Fig. 2

Side view of the investigated microchannel with transitional-type cavity on one wall

Grahic Jump Location
Fig. 3

CFD geometry and grid structure at the bottom of cavity and around cavity edge. Note: For the sake of visibility presented grid contains smaller amount of cells than used for computation.

Grahic Jump Location
Fig. 4

Dependence of the reattachment length on ReDh for the investigated cavity

Grahic Jump Location
Fig. 5

Experimental time-averaged velocity vectors fields at ReDh: (a) 95, (b) 280, (c) 800, (d) 950, and (e) 1600

Grahic Jump Location
Fig. 6

Comparison between instantaneous experimental (a) and computational and (b) velocity fields at ReDh = 800: 1—elongated stagnant recirculation loop, 2—vortex at forward-facing step, 3—saddle zone, 4—mixing layer on the interface between the channel and cavity flows

Grahic Jump Location
Fig. 7

Instantaneous simulated velocity flow fields in a turbulent flow regime at ReDh = 1600: 1, 2, 3—dominant vortices in recirculation zone, 4—vortex on the upper wall of cavity, 5—pathways of vortices (1) and (4) downstream of the reattachment, 6—averaged position of the reattachment according to experimental data (Fig. 4)

Grahic Jump Location
Fig. 8

Comparison between experimental and computational values of the reattachment length as function of ReDh

Grahic Jump Location
Fig. 9

Comparison between experimental and simulated velocity profiles at different locations behind the backward-facing step at ReDh: (a) 95, (b) 280, (c) 630, (d) 950, and (e) 1600. Note: Circles indicate the reattachment point according to the experimental results.

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In