Guided routing on spinning microfluidic platforms

Amin Kazemzadeh; P. Ganesan; Fatimah Ibrahim; Lawrence Kulinsky; Marc J. Madou

doi:10.1039/c4ra14397c

Guided routing on spinning microfluidic platforms

RSC Advances ◽

10.1039/c4ra14397c ◽

2015 ◽

Vol 5 (12) ◽

pp. 8669-8679 ◽

Cited By ~ 6

Author(s):

Amin Kazemzadeh ◽

P. Ganesan ◽

Fatimah Ibrahim ◽

Lawrence Kulinsky ◽

Marc J. Madou

Keyword(s):

Particle Distribution ◽

Flow Direction ◽

Centrifugal Microfluidics ◽

Liquid Particle ◽

Microfluidic Platforms ◽

Two Stage

A robust two stage passive microvalve is devised that can be used for (a) changing the flow direction continuously from one direction to another, and (b) liquid/particle distribution in centrifugal microfluidics.

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Numerical Investigation of Heat Transfer and Condensation Rate in Two-Stage Transport Membrane Condenser Heat Exchanger Units

Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Theory and Fundamentals in Heat Transfer; Nanoscale Thermal Transport; Heat Transfer in Equipment; Heat Transfer in Fire and Combustion; Transport Processes in Fuel Cells and Heat Pipes; Boiling and Condensation in Macro, Micro and Nanosystems ◽

10.1115/ht2016-7291 ◽

2016 ◽

Author(s):

Soheil Soleimanikutanaei ◽

Cheng-Xian Lin ◽

Dexin Wang

Keyword(s):

Heat Transfer ◽

Heat Exchanger ◽

Heat Exchangers ◽

Work Performance ◽

Transport Model ◽

Flow Direction ◽

Industrial Applications ◽

Water Recovery ◽

Condensation Rate ◽

Two Stage

Heat and water recovery using Transport Membrane Condenser (TMC) based heat exchangers is a promising technology in power generation industry. In this type of innovative heat exchangers the tube walls are made of a nano-porous material and have a high membrane selectivity which is able to extract condensate water from the flue gas in the presence of the other non-condensable gases such as CO2, O2 and N2. Considering the fact that for industrial applications, a matrix of TMC heat exchangers with several TMC modulus in the cross section or along the flow direction is necessary. Numerical simulation of multi-stage TMC heat exchanger units is of a great importance in terms of design, performance evaluation and optimization. In this work, performance of a two-stage TMC heat exchanger unit has been studied numerically using a multi-species transport model. In order to investigate the performance of the two-stage TMC heat exchanger unit, parametric study on the effect of transversal and longitudinal pitches in terms of heat transfer, pressure drop and condensation rate inside the heat exchangers have been carried out. The results indicate that the heat transfer and condensation rates both increase by reducing TMC tube pitches in the second stage and increasing the number of TMC tube pitches in the first stage of the units.

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Automated serial dilutions for high-dynamic-range assays enabled by fill-level-coupled valving in centrifugal microfluidics

Lab on a Chip ◽

10.1039/c9lc00092e ◽

2019 ◽

Vol 19 (13) ◽

pp. 2205-2219 ◽

Cited By ~ 5

Author(s):

Peter Juelg ◽

Mara Specht ◽

Elena Kipf ◽

Michael Lehnert ◽

Cornelia Eckert ◽

...

Keyword(s):

Temperature Change ◽

Dynamic Range ◽

High Dynamic Range ◽

Centrifugal Microfluidics ◽

Microfluidic Platforms ◽

Change Rate ◽

Temperature Change Rate ◽

High Dynamic ◽

Fill Level ◽

Serial Dilutions

Time-independent, serial valving under rotation on centrifugal microfluidic platforms by a fill-level-coupled temperature change rate (FLC-TCR) actuated principle.

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Tertiary Rotating Biological Contactors for Nitrification

Water Science & Technology ◽

10.2166/wst.1990.0138 ◽

1990 ◽

Vol 22 (1-2) ◽

pp. 89-100 ◽

Cited By ~ 10

Author(s):

M. Boller ◽

W. Gujer ◽

G. Nyhuis

Keyword(s):

Rotational Speed ◽

Flow Direction ◽

Full Scale ◽

Periodic Change ◽

Two Stage ◽

Trickling Filters ◽

One Stage ◽

Rotating Biological Contactors ◽

Experimental Findings

The addition of rotating biological contactors (RBC) to existing treatment plants for tertiary nitrification showed many advantages over conventional one-stage RBC's. Compared to tertiary trickling filters, the nitrification rates could be doubled. In extended pilot experiments, it was demonstrated that nitrification can additionally be enhanced by a periodic change of the flow direction in a series of RBC's, by filtration of the wastewater between the first and the second biological stage (pre-filtration) and by the control of the rotational speed. The experimental findings were confirmed in a full scale two-stage RBC-plant with intermediate filtration.

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Design of a Two-Stage Centrifugal Pump for Nuclear Systems

Volume 5: Student Paper Competition ◽

10.1115/icone24-60928 ◽

2016 ◽

Author(s):

Qian Shi ◽

Ping Ye ◽

Gang Zhao

Keyword(s):

Centrifugal Pump ◽

Nuclear Power ◽

Guide Vane ◽

Removal Rate ◽

Flow Direction ◽

Heat Removal ◽

Magnetic Bearings ◽

Hydraulic Calculation ◽

Centrifugal Pumps ◽

Two Stage

The drain pump is an essential part in the conventional island of a nuclear power plant. It affects the condensing efficiency of the condenser and the residual heat removal rate of the secondary loop. Multi-stage centrifugal pumps are used in nuclear drain pumps, of which pumps using magnetic bearings technology are innovations with extensive discussions. A design of a two-stage centrifugal pump with the magnetic bearings was presented. The stage number, the inner structure and the size of the blades came from the hydraulic calculation. Numerical simulation was employed to get the flow field. A guide vane was designed to alter the flow direction. Results indicated that an even-distributed pressure field and a fairly low turbulent kinetic energy field in the new design.

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Numerical study of particle distribution in wake of liquid-particle flows past a circular cylinder using discrete vortex method

Applied Mathematics and Mechanics ◽

10.1007/s10483-006-0414-1 ◽

2006 ◽

Vol 27 (4) ◽

pp. 535-542 ◽

Cited By ~ 2

Author(s):

Yuan-dong Huang ◽

Wen-quan Wu

Keyword(s):

Circular Cylinder ◽

Particle Distribution ◽

Numerical Study ◽

Vortex Method ◽

Liquid Particle ◽

Discrete Vortex ◽

Discrete Vortex Method ◽

Particle Flows

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3D Tomographic Transition of Particle Distribution in Microchannel

ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D ◽

10.1115/ajk2011-35007 ◽

2011 ◽

Author(s):

Je-Eun Choi ◽

Masahiro Takei

Keyword(s):

Particle Concentration ◽

Particle Distribution ◽

Solid Phase ◽

Flow Direction ◽

Three Dimensional ◽

Quantitative Result ◽

Deionized Water ◽

Two Phase ◽

Cross Sectional ◽

Reconstruction Image

The three dimensional cross-sectional particle concentrations of particle-liquid two phase flows in the two cross-seciton of microchannel has been reconstructed using process tomography. In the obtained 3D (2D space and time) reconstruction image, the dielectric particle-injected area appears to have a high particle concentration, and the deionized water-injected area appears to have a low particle concentration. Dielectric particles as the solid phase and non-conductive deionized water as the liquid phase are non-uniformly injected to the microchannel. The comparison between the qualitative result of 3D reconstruction image and the quantitative result of particle concentration in flow direction transition is that the particle is reasonably distributed in the particle injected area of the cross-section. Based on the reconstructed particle distribution image, it is easy to estimate the particle diffusion behaviors in microchannel.

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Two-stage self-seeding method for preparation of single crystals of poly(phenylene sulfide)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100153816 ◽

1989 ◽

Vol 47 ◽

pp. 368-369

Author(s):

Sengshiu Chung ◽

Peggy Cebe

Keyword(s):

Single Crystals ◽

High Performance ◽

Dilute Solution ◽

Two Stage ◽

Annealing Behavior ◽

High Performance Polymers ◽

Seeding Method ◽

Phenylene Sulfide

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.

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