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Active flow control

Recent progress in microflow devices and systems is described in this chapter. Examples of passive and active flow control methods applicable in practical pTAS are described in Sect. 2. Multiple flow control systems, i.e., arrayed microvalves, for advanced high-throughput microflow systems are then introduced in Sect. 3. Examples of microflow devices and systems for chemical and biochemical applications are described in Sect. 4. [Pg.4]

Liquid flow is incompressible, so, in micrometer-scale channels, the flow has a small Reynolds number (Re), usually less than 1, and the flow in simple microchannels is laminar, thus chaotic or turbulent flows are not observed [1]. Many types of microfluidic device have been developed on the basis of this flow behavior. Functional flow control methods based on laminar flow profiles have been proposed and applied in microflow devices and systems. Passive and active flow control methods and their applications are introduced in this section. [Pg.4]

Figure 12. Arrangement for an active flow control unit in parallel HPLC.The partial flows Fi to F resulting from the total flow F, ,a] can be measured by metering the pressure drop along the restrictor capillaries to R . The flows are adjustable by the valves in an individual branch. i yj ito f i,e can be compared to potentiometers in an electrical circuit. The specific settings of the valves lead to an equal flow in all the separation columns with different fluidic resistance i cohumii to, and thus different backpressure. Figure 12. Arrangement for an active flow control unit in parallel HPLC.The partial flows Fi to F resulting from the total flow F, ,a] can be measured by metering the pressure drop along the restrictor capillaries to R . The flows are adjustable by the valves in an individual branch. i yj ito f i,e can be compared to potentiometers in an electrical circuit. The specific settings of the valves lead to an equal flow in all the separation columns with different fluidic resistance i cohumii to, and thus different backpressure.
This active flow control unit is plugged to an isocratic or gradient pumping system. It divides the total pump flow Ftomi into exactly equal split... [Pg.312]

Active Flow Control Enabling Next-Generation Jet Propulsion Aerodynamics... [Pg.14]

Active Flow Control Enabling Next-Generation Jet Propulsion Aerodynamics Jeffrey W. Hamstra, Lockheed Marlin Aeronautics Company... [Pg.130]

Johnson, R. J. and Pitchnmani, R., Active flow control in a VARTM process nsing localized indnction heating , http //www.me.vt.edu/amtl/index htm files/c0404.pdf (Accessed 14 Jnne 2011). [Pg.480]

Jacot, D. Calkins, T. and Smith, J. Boeing Active Flow Control System (BAFCS)-III. Proc. SPIE Vol. 4698 (2002) pp. 76-84... [Pg.459]

Lee C, Hong G, Ha QP, Mallinson SG (2003) A piezoelectrically actuated micro synthetic jet for active flow control. Sens Actuators A108 168-174... [Pg.2119]

Baldi A, Gu Y, Loftness PE et al (2003) A hydrogel-actuated environmentally sensitive microvalve for active flow control. J Microelectromech Syst 12 613-621. doi 10.1109/... [Pg.24]

See other pages where Active flow control is mentioned: [Pg.47]    [Pg.245]    [Pg.4]    [Pg.9]    [Pg.13]    [Pg.244]    [Pg.317]    [Pg.3384]    [Pg.14]    [Pg.3]    [Pg.383]    [Pg.384]   
See also in sourсe #XX -- [ Pg.384 ]



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