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Bodén, Roger
Alternative names
Publications (10 of 25) Show all publications
Ogden, S., Bodén, R., Do-Quang, M., Wu, Z., Amberg, G. & Hjort, K. (2014). Fluid behavior of supercritical carbon dioxide with water in a double-Y-channel microfluidic chip. Microfluidics and Nanofluidics, 17(6), 1105-1112
Open this publication in new window or tab >>Fluid behavior of supercritical carbon dioxide with water in a double-Y-channel microfluidic chip
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2014 (English)In: Microfluidics and Nanofluidics, ISSN 1613-4982, E-ISSN 1613-4990, Vol. 17, no 6, p. 1105-1112Article in journal (Refereed) Published
Abstract [en]

The use of supercritical carbon dioxide (scCO2) as an apolar solvent has been known for decades. It offers a greener approach than, e.g., hexane or chloroform, when such solvents are needed. The use of scCO2 in microsystems, however, has only recently started to attract attention. In microfluidics, the flow characteristics need to be known to be able to successfully design such components and systems. As supercritical fluids exhibit the exciting combination of low viscosity, high density, and high diffusion rates, the fluidic behavior is not directly transferrable from aqueous systems. In this paper, three flow regimes in the scCO2–liquid water two-phase microfluidic system have been mapped. The effect of both total flow rate and relative flow rate on the flow regime is evaluated. Furthermore, the droplet dynamics at the bifurcating exit channel are analyzed at different flow rates. Due to the low viscosity of scCO2, segmented flows were observed even at fairly high flow rates. Furthermore, the carbon dioxide droplet behavior exhibited a clear dependence on both flow rate and droplet length.

Keywords
Two-phase flow, segmented flow, parallel flow, wavy flow droplet dynamics
National Category
Fluid Mechanics and Acoustics
Research subject
Engineering Science with specialization in Microsystems Technology
Identifiers
urn:nbn:se:uu:diva-207265 (URN)10.1007/s10404-014-1399-6 (DOI)000345389900014 ()
Funder
Swedish Research Council
Available from: 2013-10-10 Created: 2013-09-11 Last updated: 2017-12-06Bibliographically approved
Andersson, M., Knaust, S., Ogden, S., Hjort, K. & Bodén, R. (2014). Integrated high-pressure fluid manipulation in microfluidic systems. In: : . Paper presented at 10th Micronano Systems Workshop (MSW), 15-16 May, 2014, Uppsala, Sweden.
Open this publication in new window or tab >>Integrated high-pressure fluid manipulation in microfluidic systems
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2014 (English)Conference paper, Poster (with or without abstract) (Other academic)
National Category
Other Engineering and Technologies not elsewhere specified
Identifiers
urn:nbn:se:uu:diva-239206 (URN)
Conference
10th Micronano Systems Workshop (MSW), 15-16 May, 2014, Uppsala, Sweden
Available from: 2014-12-19 Created: 2014-12-19 Last updated: 2015-01-13Bibliographically approved
Bodén, R., Ogden, S. & Hjort, K. (2014). Microdispenser with continuous flow and selectable target volume for microfluidic high-pressure applications. Journal of microelectromechanical systems, 23(2), 452-458
Open this publication in new window or tab >>Microdispenser with continuous flow and selectable target volume for microfluidic high-pressure applications
2014 (English)In: Journal of microelectromechanical systems, ISSN 1057-7157, E-ISSN 1941-0158, Vol. 23, no 2, p. 452-458Article in journal (Refereed) Published
Abstract [en]

This paper presents a reusable microdispenser intended for continuous flow dispensing of variable and controlled volumes of liquid against high back-pressures. The microdispenser consists of two active valves and a dispenser chamber, all actuated by the volume change associated with the solid-to-liquid phase transition of paraffin wax. It is fabricated using stainless steel sheets, a flexible printed circuit board, and a polyimide membrane. All are covered with Parylene C for insulation and fusion bonding at assembly. A finite element method (FEM) model of the paraffin actuator is used to predict the resulting flow characteristics. The results show dispensing of well-defined volumes of 350 and 540 nL, with a good repeatability between dispensing sequences, as well as reproducibility between devices. In addition, the flow characteristics show no back-pressure dependence of the dispensed flow in the interval 0.5--2.0 MPa. The FEM model can be used to predict the flow characteristics qualitatively

Keywords
High pressure, liquid chromatography, MEMS, microdispenser, micropump, phase change material
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Microsystems Technology
Identifiers
urn:nbn:se:uu:diva-208855 (URN)10.1109/JMEMS.2013.2279976 (DOI)000334526200022 ()
Funder
Swedish Research CouncilVINNOVA, 29461-1ÅForsk (Ångpanneföreningen's Foundation for Research and Development)
Available from: 2013-10-09 Created: 2013-10-09 Last updated: 2017-12-06Bibliographically approved
Ogden, S., Hjort, K. & Bodén, R. (2014). Microdispenser withcontinuous flow and selectable target volume for microfluidic high-pressure applications. Journal of microelectromechanical systems, 23, 452-458
Open this publication in new window or tab >>Microdispenser withcontinuous flow and selectable target volume for microfluidic high-pressure applications
2014 (English)In: Journal of microelectromechanical systems, ISSN 1057-7157, E-ISSN 1941-0158, Vol. 23, p. 452-458Article in journal (Refereed) Published
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-238900 (URN)
Available from: 2014-12-17 Created: 2014-12-17 Last updated: 2017-12-05
Ogden, S., Klintberg, L., Thornell, G., Hjort, K. & Bodén, R. (2014). Review on miniaturized paraffin phase change actuators, valves, and pumps. Microfluidics and Nanofluidics, 17(1), 53-71
Open this publication in new window or tab >>Review on miniaturized paraffin phase change actuators, valves, and pumps
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2014 (English)In: Microfluidics and Nanofluidics, ISSN 1613-4982, E-ISSN 1613-4990, Vol. 17, no 1, p. 53-71Article, review/survey (Refereed) Published
Abstract [en]

During the last fifteen years, miniaturised paraffin actuation has evolved through the need of a simple actuation principle, still able to deliver large strokes and high actuation forces at small scales. This is achieved by the large and rather incompressible volume expansion associated with the solid-to-liquid phase transition of paraffin. The common approach has been to encapsulate the paraffin by a stiff surrounding that directs the volume expansion towards a flexible membrane, which deflects in a directed stroke. However, a number of alternative methods have also been used in the literature. The most common applications to this date have been switches, positioning actuators, and microfluidic valves and pumps. This review will treat the historical background, as well as the fundamentals in paraffin actuation, including material properties of paraffin. Besides reviewing the three major groups of paraffin actuator applications; actuators, valves, and pumps, the modelling done on paraffin actuation will be explored. Furthermore, a section focusing on fabrication of paraffin microactuators is also included. The review ends with conclusions and outlook of the field, identifying unexplored potential of paraffin actuation.

National Category
Applied Mechanics
Research subject
Engineering Science with specialization in Microsystems Technology
Identifiers
urn:nbn:se:uu:diva-208904 (URN)10.1007/s10404-013-1289-3 (DOI)000338835300002 ()
Available from: 2013-11-30 Created: 2013-10-10 Last updated: 2017-12-06Bibliographically approved
Ogden, S., Bodén, R., Do-Quang, M., Wu, Z. & Hjort, K. (2013). Fluid mechanics of supercritical carbon dioxide with water in a double-y-channel microfluidic chip. In: Micromechanics and microsystems europe: . Paper presented at Micromechanics and microsystems europe 2013.
Open this publication in new window or tab >>Fluid mechanics of supercritical carbon dioxide with water in a double-y-channel microfluidic chip
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2013 (English)In: Micromechanics and microsystems europe, 2013Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

In this paper, three flow regimes in thesupercritical carbon dioxide-water two-phase microfluidicsystem are mapped. The effect of both totalflow rate and relative flow rate on the flow regime isevaluated. Furthermore, the droplet dynamics at thebifurcating exit channel is analysed at different flowrates. The influence of the capillary number ondroplet splitting at the exit is also evaluated.

Keywords
Two-phase, Segmented flow, Laminar flow
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Microsystems Technology
Identifiers
urn:nbn:se:uu:diva-212581 (URN)
Conference
Micromechanics and microsystems europe 2013
Funder
Swedish Research Council
Available from: 2013-12-12 Created: 2013-12-12 Last updated: 2014-02-03
Ogden, S., Knaust, S., Dahlin, A., Hjort, K. & Bodén, R. (2013). On-chip pump system for high-pressure microfluidic applications. In: : . Paper presented at µTAS 2013 (pp. 1472-1474).
Open this publication in new window or tab >>On-chip pump system for high-pressure microfluidic applications
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2013 (English)Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

This paper presents a micropump system with four integrated paraffin actuated pumps: Two mobile phase pumps and two sample injector pumps. The mobile phase pumps are evaluated by their ability to deliver a stable, low-ripple flow to be used in chip-based high performance liquid chromatography. It is shown that the two mobile phase pumps can be driven in combined operation with an induced offset to significantly lower flow fluctuations.

Keywords
High Pressure, Paraffin, Phase Change Material, Microelectromechanical Systems
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Microsystems Technology
Identifiers
urn:nbn:se:uu:diva-204725 (URN)
Conference
µTAS 2013
Funder
Swedish Research Council
Available from: 2013-08-09 Created: 2013-08-09 Last updated: 2015-09-07
Ogden, S., Jonsson, J., Bodén, R., Thornell, G. & Hjort, K. (2012). Latchable Valve for Microfluidic Sampling from a Miniature Submersible. In: Actuator. Paper presented at Actuator (pp. 717-720).
Open this publication in new window or tab >>Latchable Valve for Microfluidic Sampling from a Miniature Submersible
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2012 (English)In: Actuator, 2012, p. 717-720Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

This work presents latchable high-pressure valves. Such valves are useful in a number of applications, e.g deep-sea sampling. Actuation and latching are achieved by using sequential melting and solidification of three connected paraffin-filled cavities, as well as a compliant valve seat. The valve seat design uses the applied back pressure to improve sealing, shown both in the valve’s endurance and burst pressure. The valves were evaluated by pressurizing them with both compressed air and water. At an applied hydrostatic back pressure kept above 2.1 MPa, the valve managed to stay closed without power consumption for 19 hours. The burst pressure was determined to 20 MPa when subjected to a hydrostatic pressure, and 5.6 MPa when subjected to a pneumatic pressure.

National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Microsystems Technology
Identifiers
urn:nbn:se:uu:diva-180951 (URN)
Conference
Actuator
Available from: 2012-09-13 Created: 2012-09-13 Last updated: 2013-03-05
Ogden, S., Bodén, R. & Hjort, K. (2010). A Latchable Valve for High-Pressure Microfluidics. Journal of microelectromechanical systems, 19(2), 396-401
Open this publication in new window or tab >>A Latchable Valve for High-Pressure Microfluidics
2010 (English)In: Journal of microelectromechanical systems, ISSN 1057-7157, E-ISSN 1941-0158, Vol. 19, no 2, p. 396-401Article in journal (Refereed) Published
Abstract [en]

In this paper, the strongest yet latchable valve in subcubic-centimeter size for microfluidic applications is presented. The device has an integrated actuator cavity consisting of three segments filled with paraffin, each operated by a separate heater. At one of the segments, a membrane valve head is deflected by the expansion of the resistively melted paraffin to close against its valve seat. Different heating sequences provide a latched closed or opened valve. The maximum pressure before any leakage occurred was 2.5 MPa. The leak pressure is found to be progressively dependent on the clamping pressure applied. The valve has an opening and closing time of 7 and 1 s, respectively. At an applied pressure of 0.3 MPa, the closed valve needs to be reactivated every 100 min to remain leakage free, leading to an average power consumption of 4.5 mW.

Keywords
Fluid flow control, microactuators, steel, valves
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Microsystems Technology
Identifiers
urn:nbn:se:uu:diva-126963 (URN)10.1109/JMEMS.2010.2041749 (DOI)000276257700019 ()
Available from: 2010-07-01 Created: 2010-07-01 Last updated: 2017-12-12Bibliographically approved
Ogden, S., Bodén, R. & Hjort, K. (2009). A latchable paraffin actuated high-pressure paraffin microfluidic valve. In: 15th International Conference on Solid-State Sensors, Actuators and Microsystems, Transducers 2009: . Paper presented at Int. Conf. on Solid-State Sensors, Actuators and Microsystems (pp. 29-32).
Open this publication in new window or tab >>A latchable paraffin actuated high-pressure paraffin microfluidic valve
2009 (English)In: 15th International Conference on Solid-State Sensors, Actuators and Microsystems, Transducers 2009, 2009, p. 29-32Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-111699 (URN)10.1109/SENSOR.2009.5285573 (DOI)978-1-4244-4190-7 (ISBN)
Conference
Int. Conf. on Solid-State Sensors, Actuators and Microsystems
Available from: 2009-12-21 Created: 2009-12-21 Last updated: 2016-04-14
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