Polymer Day: Outreach Experiments for High School Students
Transient Cooperativity behind the Dynamics of Sheared Polymer Melts
Polymer Day: Outreach Experiments for High School Students
Numerical modeling of polymer molecules flow, shown as yellow
Polymer Flow Module
Example results from flow experiments conducted with one of the
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Dust Collector Project
Static pole flow experiments from Yvonne Smink and Vladimir Karachunov
Polymer fluid flow under shear
DEM(Discrete element method) thermal flow simulation & melting simulation
Science Experiments for Kids
Flow Over Weirs
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General route to design polymer molecular weight distributions ...
Fig. 3: Reactor design, chemistry, fluid flow diagram, and data for polymer tracer experiments. a Flow reactor configuration for the tracer experiments. b DBU catalyzed ROP of lactide with an ...
Experimental quantitation of molecular conditions responsible for flow
Rapid solvent flows stretch dissolved polymer chains to their breaking point by hitherto-elusive molecular mechanisms. Now, analysis of competing mechanochemical reactions suggests a broad ...
Here the flow field of an entangled polymer melt through an extended contraction, typical of many polymer processes, is imaged optically and by small-angle neutron scattering. The dual-probe technique samples both the macroscopic stress field in the flow and the microscopic configuration of the polymer molecules at selected points.
Recent progress in flow-induced polymer crystallization
Understanding polymer crystallization with the presence of flow, or namely flow-induced crystallization (FIC), is crucial to optimize polymer processing parameters and to understand phase transition under far-from equilibrium conditions, as FIC is essentially a typical nonequilibrium process.
Experimental observation of the elastic range scaling in turbulent flow
INTRODUCTION A tiny amount of long-chain flexible polymer dissolved in a fluid can drastically change the flow properties. At low Reynolds numbers, a normal fluid flow is stable and laminar, while the addition of polymers can induce strong fluctuations and create elastic turbulence (1).
Turbulent drag reduction by polymer additives: Fundamentals and recent
A small amount of polymer additives can cause substantial reduction in the energy dissipation and friction loss of turbulent flow. The problem of polymer-induce
Mechanisms of Flow-Induced Multistep Structure Evolution in
Research on polymer crystallization induced by flow has been one of the most fascinating topics in the field of polymer science. Structural changes during polymer crystallization induced by flow follow a multiscale and multistep mechanism. However, the structural changes are complex and rapid, making it challenging to accurately observe them online in experiments. Fortunately, computer ...
Experimental and numerical investigation of polymer pore ...
The simulations revealed a decline in flow conductivity over time within the flow channels that experienced polymer accumulation and retention, which is consistent with the experimental ...
Modeling and Experimental Studies on Polymer Melting and Flow in
When modeling injection molding, the global approach is necessary to take into account the solid polymer transport, polymer melting and the polymer melt flow. The model of polymer melting is fundamental for the development of such a global injection molding model. In the paper, the state-of-the-art of modeling and experimentation of the flow ...
Pore-scale experiments reveal distinct flow field of polymer flooding
To investigate the influence of salinity on the EOR mechanism of polymers, a combination of traditional micro-visualization porous flow experiments and Micro-PIV technique was conducted to observe the dynamics during polymer flooding.
Modeling and Experimental Studies on Polymer Melting and Flow in ...
Injection molding, in addition to extrusion, is the most important technology in the polymer processing industry. When modeling injection molding, the global approach is necessary to take into account the solid polymer transport, polymer melting and the polymer melt flow. The model of polymer melting is fundamental for the development of such a global injection molding model. In the paper, the ...
Research on Polymer Viscous Flow Activation Energy and Non‐Newtonian
The viscous flow activation energy and non-Newtonian index properties of polymer based on feature size were studied through a series of experiments on the rheological properties of amorphous polymer ...
The Modelling of Extrusion Processes for Polymers—A Review
This article systematically and critically reviews the literature related to the process design, machine design, process parameters, flow models, and flow analysis of extrusion with a focus on modelling the extrusion of composite materials. Keywords: extrusion, screw, modelling, polymer, processing. 1.
Experimental Analysis and Numerical Modeling of Polymer ...
Both macroscopic and microscopic sweep efficiencies were evaluated by analyzing high-resolution pictures continuously captured during the multiphase flow experiments. The rheological measurements revealed that viscosity of the polymer solution is more sensitive to increasing polymer concentration than salinity.
Polymer Injectivity Test Design Using Numerical Simulation
In addition, numerous polymer flow experiments in porous media have shown that HPAM exhibits an apparent shear thickening behavior beyond a critical shear rate [5].
Modeling and Simulation of Polymer Flooding with Time-Varying Injection
The simulator should have the pertinent functionalities required not only for modeling core flooding experiments for better understanding of the polymer flow behavior during chemical flooding, but also for parametric simulation, which can be effectively employed in commercial-scale applications.
Polymers Go with the Flow
Polymers Go with the Flow. T he flow of polymers, either as melts or in solution, shows some intriguing features. Polymeric liquids climb stirrer rods (the Weissenberg effect), swell up at the exit of an extruder or capillary, and can even sustain tubeless siphons (1, 2). These phenomena cannot be explained by classical hydrodynamics.
Basic principle and good practices of rheology for polymers for
We present a basic principle and good practices of the rheology of polymers, particularly for teachers or lecturers at colleges or universities for educational purposes, as well as for beginner researchers who may refer to this article as their self-learning resources. Basic consideration of the experimental methods using parallel-plate oscillatory rheometer and step-by-step guidelines for the ...
Polymer Flow in Porous Media: Relevance to Enhanced Oil Recovery
The experiments addressed highrate, near-wellbore behavior (radial flow), reservoir rate steady-state flow (linear flow) and the differences observed in terms of flow conditions. In addition, the impact of oil on polymer rheology was investigated and compared to single-phase polymer flow in Bentheimer sandstone rock material.
Polymer‐Sorbent Direct Air Capture Contactors with Complex Geometries
Then, the inlet flow was switched to a 400 ppm CO 2 /N 2 mixture with the same relative humidity at a flow rate of 100, 400, 600, and 800 sccm for the gyroid module. Humid breakthrough analyses were conducted for the fiber-packed column under superficial velocities comparable to the gyroid module experiment.
Polymer Flooding in Heterogeneous Heavy Oil Reservoirs: Experimental
In this paper, polymer degradation, rheological properties of polymer solution and heavy oil, and their flow in porous media were investigated by physical experiments. After that, a new mathematical model that can simultaneously consider both polymer degradation and non-Newtonian flow was established.
Well-designed chitosan-based cationic porous polymer: A robust material
The mobile phase was a mixture solution of acetonitrile and water with the ratio of 50: 50 (v/v) at the flow rate of 1.0 mL min −1. The detection wavelength for four EDCs was 228 nm. 2.4. Adsorption experiments. Each EDC stock solution of 3 mg mL −1 was prepared in methanol and stored in 4 °C. Different concentrations of EDCs aqueous ...
General route to design polymer molecular weight distributions through
General procedure for MWD design. In a typical experiment, the flow reactor is setup by first filling one syringe with a solution containing the monomer and a second syringe is filled with a initiator (an activator or inhibitor may be added to either syringe to adjust the rate of polymerizations).
Polymer Injectivity Test Design Using Numerical Simulation
In addition, numerous polymer flow experiments in porous media have shown that HPAM exhibits an apparent shear thickening behavior beyond a critical shear rate [ 5 ].
Selecting EOR Polymers through Combined Approaches—A Case for Flooding
This work uses micromodel, core floods and Field-Flow Fractionation (FFF) evaluations to estimate the behaviour and key elements for selecting polymers to address heterogenous reservoirs. One of the approaches was to construct two-layered micromodels ...
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Fig. 3: Reactor design, chemistry, fluid flow diagram, and data for polymer tracer experiments. a Flow reactor configuration for the tracer experiments. b DBU catalyzed ROP of lactide with an ...
Rapid solvent flows stretch dissolved polymer chains to their breaking point by hitherto-elusive molecular mechanisms. Now, analysis of competing mechanochemical reactions suggests a broad ...
Here the flow field of an entangled polymer melt through an extended contraction, typical of many polymer processes, is imaged optically and by small-angle neutron scattering. The dual-probe technique samples both the macroscopic stress field in the flow and the microscopic configuration of the polymer molecules at selected points.
Understanding polymer crystallization with the presence of flow, or namely flow-induced crystallization (FIC), is crucial to optimize polymer processing parameters and to understand phase transition under far-from equilibrium conditions, as FIC is essentially a typical nonequilibrium process.
INTRODUCTION A tiny amount of long-chain flexible polymer dissolved in a fluid can drastically change the flow properties. At low Reynolds numbers, a normal fluid flow is stable and laminar, while the addition of polymers can induce strong fluctuations and create elastic turbulence (1).
A small amount of polymer additives can cause substantial reduction in the energy dissipation and friction loss of turbulent flow. The problem of polymer-induce
Research on polymer crystallization induced by flow has been one of the most fascinating topics in the field of polymer science. Structural changes during polymer crystallization induced by flow follow a multiscale and multistep mechanism. However, the structural changes are complex and rapid, making it challenging to accurately observe them online in experiments. Fortunately, computer ...
The simulations revealed a decline in flow conductivity over time within the flow channels that experienced polymer accumulation and retention, which is consistent with the experimental ...
When modeling injection molding, the global approach is necessary to take into account the solid polymer transport, polymer melting and the polymer melt flow. The model of polymer melting is fundamental for the development of such a global injection molding model. In the paper, the state-of-the-art of modeling and experimentation of the flow ...
To investigate the influence of salinity on the EOR mechanism of polymers, a combination of traditional micro-visualization porous flow experiments and Micro-PIV technique was conducted to observe the dynamics during polymer flooding.
Injection molding, in addition to extrusion, is the most important technology in the polymer processing industry. When modeling injection molding, the global approach is necessary to take into account the solid polymer transport, polymer melting and the polymer melt flow. The model of polymer melting is fundamental for the development of such a global injection molding model. In the paper, the ...
The viscous flow activation energy and non-Newtonian index properties of polymer based on feature size were studied through a series of experiments on the rheological properties of amorphous polymer ...
This article systematically and critically reviews the literature related to the process design, machine design, process parameters, flow models, and flow analysis of extrusion with a focus on modelling the extrusion of composite materials. Keywords: extrusion, screw, modelling, polymer, processing. 1.
Both macroscopic and microscopic sweep efficiencies were evaluated by analyzing high-resolution pictures continuously captured during the multiphase flow experiments. The rheological measurements revealed that viscosity of the polymer solution is more sensitive to increasing polymer concentration than salinity.
In addition, numerous polymer flow experiments in porous media have shown that HPAM exhibits an apparent shear thickening behavior beyond a critical shear rate [5].
The simulator should have the pertinent functionalities required not only for modeling core flooding experiments for better understanding of the polymer flow behavior during chemical flooding, but also for parametric simulation, which can be effectively employed in commercial-scale applications.
Polymers Go with the Flow. T he flow of polymers, either as melts or in solution, shows some intriguing features. Polymeric liquids climb stirrer rods (the Weissenberg effect), swell up at the exit of an extruder or capillary, and can even sustain tubeless siphons (1, 2). These phenomena cannot be explained by classical hydrodynamics.
We present a basic principle and good practices of the rheology of polymers, particularly for teachers or lecturers at colleges or universities for educational purposes, as well as for beginner researchers who may refer to this article as their self-learning resources. Basic consideration of the experimental methods using parallel-plate oscillatory rheometer and step-by-step guidelines for the ...
The experiments addressed highrate, near-wellbore behavior (radial flow), reservoir rate steady-state flow (linear flow) and the differences observed in terms of flow conditions. In addition, the impact of oil on polymer rheology was investigated and compared to single-phase polymer flow in Bentheimer sandstone rock material.
Then, the inlet flow was switched to a 400 ppm CO 2 /N 2 mixture with the same relative humidity at a flow rate of 100, 400, 600, and 800 sccm for the gyroid module. Humid breakthrough analyses were conducted for the fiber-packed column under superficial velocities comparable to the gyroid module experiment.
In this paper, polymer degradation, rheological properties of polymer solution and heavy oil, and their flow in porous media were investigated by physical experiments. After that, a new mathematical model that can simultaneously consider both polymer degradation and non-Newtonian flow was established.
The mobile phase was a mixture solution of acetonitrile and water with the ratio of 50: 50 (v/v) at the flow rate of 1.0 mL min −1. The detection wavelength for four EDCs was 228 nm. 2.4. Adsorption experiments. Each EDC stock solution of 3 mg mL −1 was prepared in methanol and stored in 4 °C. Different concentrations of EDCs aqueous ...
General procedure for MWD design. In a typical experiment, the flow reactor is setup by first filling one syringe with a solution containing the monomer and a second syringe is filled with a initiator (an activator or inhibitor may be added to either syringe to adjust the rate of polymerizations).
In addition, numerous polymer flow experiments in porous media have shown that HPAM exhibits an apparent shear thickening behavior beyond a critical shear rate [ 5 ].
This work uses micromodel, core floods and Field-Flow Fractionation (FFF) evaluations to estimate the behaviour and key elements for selecting polymers to address heterogenous reservoirs. One of the approaches was to construct two-layered micromodels ...