A microfluidic approach for probing hydrodynamic effects in barite scale formation

Lab on a Chip ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 1534-1544 ◽  
Author(s):  
Ricardo D. Sosa ◽  
Xi Geng ◽  
Michael A. Reynolds ◽  
Jeffrey D. Rimer ◽  
Jacinta C. Conrad
Keyword(s):  
Scale Formation ◽  
Flow Conditions ◽  
Dynamic Flow ◽  
Common Component ◽  
Mineral Scale ◽  
Hydrodynamic Effects ◽  
Microfluidics Platform

We present a microfluidics platform for characterizing the growth and dissolution of barite, a common component of mineral scale, in dynamic flow conditions.

scholarly journals Subharmonic Contrast Microbubble Signals for Noninvasive Pressure Estimation under Static and Dynamic Flow Conditions

2011 ◽  
Vol 33 (3) ◽  
pp. 153-164 ◽  
Author(s):  
Valgerdur G. Halldorsdottir ◽  
Jaydev K. Dave ◽  
Lauren M. Leodore ◽  
John R. Eisenbrey ◽  
Suhyun Park ◽  
...  
Keyword(s):  
Flow Conditions ◽  
Dynamic Flow ◽  
Pressure Estimation

Computer-aided analysis of cell interactions under dynamic flow conditions

2009 ◽  
Vol 18 (3) ◽  
pp. 238-245 ◽  
Author(s):  
Oliver Giegold ◽  
Ralf J. Ludwig ◽  
Katja Hardt ◽  
Jutta Will ◽  
Michael P. Schön ◽  
...  
Keyword(s):  
Cell Interactions ◽  
Flow Conditions ◽  
Dynamic Flow ◽  
Computer Aided Analysis ◽  
Computer Aided

scholarly journals Identification for control of suspended objects in non-Newtonian fluids

2019 ◽  
Vol 22 (5) ◽  
pp. 1378-1394 ◽  
Author(s):  
Isabela Birs ◽  
Cristina Muresan ◽  
Dana Copot ◽  
Ioan Nascu ◽  
Clara Ionescu
Keyword(s):  
Newtonian Fluid ◽  
Pulsatile Flow ◽  
Controller Design ◽  
Velocity Profiles ◽  
Navier Stokes ◽  
Flow Conditions ◽  
Dynamic Flow ◽  
Fluid Environment ◽  
Flow Changes ◽  
Identification For Control

Abstract This paper proposes a framework for modelling velocity profiles and suspended objects in non-Newtonian fluid environment. A setup is proposed to allow mimicking blood properties and arterial to venous dynamic flow changes. Navier-Stokes relations are employed followed by fractional constitutive equations for velocity profiles and flow. The theoretical analysis is performed under assumptions of steady and pulsatile flow conditions, with incompressible properties. The fractional derivative model for velocity and friction drag effect upon a suspended object are determined. Experimental data from such an object is then recorded in real-time and identification of a fractional order model performed. The model is determined from step input changes during pulsatile flow for velocity in the direction of the flow. Further on, this model can be employed for controller design purposes for velocity and position in pulsatile non-Newtonian fluid flow.

scholarly journals Life under Continuous Streaming: Recrystallization of Low Concentrations of Bacterial SbpA in Dynamic Flow Conditions

Coatings ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 76 ◽  
Author(s):  
Jagoba Iturri ◽  
Alberto Moreno-Cencerrado ◽  
José Toca-Herrera
Keyword(s):  
Self Assembly ◽  
Divalent Cations ◽  
Crystal Formation ◽  
Flow Conditions ◽  
Dynamic Flow ◽  
Protein Film ◽  
Force Microscopy ◽  
Low Concentrations ◽  
Physico Chemical ◽  
Protein Supply

The well-known bacterial S-layer protein SbpA from Lysinibacillus sphaericus CCM2177 induces spontaneous crystal formation via cooperative self-assembly of the protein subunits into an ordered supramolecular structure. Recrystallization occurs in the presence of divalent cations (i.e., Ca2+) and finally leads to producing smooth 2-D crystalline coatings composed of squared (p4) lattice structures. Among the factors interfering in such a process, the rate of protein supply certainly plays an important role since a limited number of accessible proteins might turn detrimental for film completion. Studies so far have mostly focused on high SbpA concentrations provided under stopped-flow or dynamic-flow conditions, thus omitting the possibility of investigating intermediate states, in which dynamic flow is applied for more critical concentrations of SbpA (i.e., 25, 10, and 5 µg/mL). In this work, we have characterized both physico-chemical and topographical aspects of the assembly and recrystallization of SbpA protein in such low concentration conditions by means of in situ Quartz Crystal Microbalance with Dissipation (QCMD) and atomic force microscopy (AFM) measurements, respectively. On the basis of these experiments, we can confirm how the application of a dynamic flow influences the formation of a closed and crystalline protein film from low protein concentrations (i.e., 10 µg/mL), which otherwise would not be formed.

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