We treat the flow of ferrofluid in a cylindrical container subjected to uniform rotating magnetic field, commonly referred as spin-up flow. A review theoretical and experimental results published since phenomenon was first observed 1967 shows that data from surface observations tracer particles are inadequate for assessment bulk theories. present direct measurements by using ultrasound velocity profile method, torque water kerosene based ferrofluids, showing fluid corotating with field...

Adsorptive phenomena involving dispersed iron oxide superparamagnetic nanoparticles and asphaltenes in crude oil have been profiled as promising technological alternatives, particularly since these interactions can induce significant structural changes within the matrices, effectively inhibiting formation of complex long-range viscoelastic structures. Furthermore, effect adsorbed on magnetic dipolar among particles has proven, showing multiple asphaltene layers that stimulate a steric...

The wettability of granular solids is a critical parameter in numerous industrial applications, including enhanced oil recovery, advanced material coatings, and nanotechnology. However, traditional methods for assessing wettability, such as contact angle measurements, face significant challenges when applied to heterogeneous or porous solids. This study proposes rheological methodology an alternative approach determine the solids, focusing on bentonite clay modified via sodium dodecylbenzene...

Direct measurements of the bulk flow a ferrofluid in uniform rotating magnetic field were obtained using ultrasonic velocity profile method. The fluid was observed to corotate with rigid-body-like fashion throughout container, except near air-fluid interface, where it counterrotate. results found qualitative agreement spin diffusion theory Zaitsev and Shliomis [J. Appl. Mech. Tech. Phys. 10, 696 (1969)]10.1007/BF00907424.

In a previous article (Molina V., D.; Energy Fuels 2017, 31, 133−139; DOI: 10.1021/acs.energyfuels.6b01887) the structural differences of asphaltenes in Colombian light crude oils from same field, i.e., Colorado oilfield, were presented. oil is with very low content (<0.3%, w/w) and presents paraffin crystallization problems during its production. parafinic deposits, have also been found. this work, new methodology proposed to determine effects chemical structure concentration on wax...

An essential understanding of the adsorptive phenomena involving nanomaterials and asphaltenes has received considerable attention in oil recovery production applications. Particularly, iron oxide-based nanoparticles have emerged as advanced materials due to their unique physicochemical properties, including thermal conductivity superparamagnetism. On this basis, kinetics adsorption isotherms magnetite (Fe3O4) nanoparticles/asphaltene systems were investigated, well synergistic effect resins...

An asymptotic solution is obtained for flow of a ferrofluid between two stationary coaxial cylinders infinite extent, including the effects spin viscosity. This takes into account nonuniformity magnetic field in annular space that arises as consequence demagnetizing inner cylinder. In limit zero viscosity analysis predicts there no gap. For nonzero annulus with corotation and fluid close to outer cylinder wall counter-rotation wall. The predictions translational velocity are compared...

Interfacial linear and internal angular momentum balances are obtained for a structured continuum the special case of ferrofluid, suspension magnetic nanoparticles in Newtonian fluid. The interfacial balance equations account effects surface tension gradient, excess forces, antisymmetric stresses, couple stresses driving flows ferrofluids. Application is illustrated by obtaining analytical expressions translational spin velocity profiles thin film ferrofluid on an infinite flat plate when...

This review aims to contextualize the prospective integration of ferrofluid technologies into two critical oil macro-processes: recovery and transportation, both fundamental components supply chain. The initial section explores research content emerging trends associated with this technology by conducting a bibliometric analysis highlight its advancements, drawbacks, potential within industry. subsequent discusses most relevant theoretical aspects ferrofluids, particular emphasis on...

In our previous articles (Energy & Fuels 2017, 31, 133–139 and Energy 8997–9005), it was presented that the asphaltenes of Colorado field have different chemical structures, these change properties crystallization paraffins. this paper, we present a new way to understand effects structure on crude oil rheology, which includes correlating average molecular parameters (AMPs) concentration with rheological using chemometric methods such as partial least squares method. The were separated from...

Gas–liquid separators are one type of surface facility among those used in oil fields. In this paper, the study gas–liquid separation a cylindrical cyclone separator (GLCC) using computational fluids dynamics was carried out. The multiphase mixture model and k–ε turbulence an air–water with different geometries varying inlet angle from 27° to 36° 45° were used. Later, variables for volumetric fraction, velocity, pressure drop studied. Finally, natural gas Colombian field simulated species...

We report analysis and measurements of the torque flow a ferrofluid in cylindrical annulus subjected to rotating magnetic field perpendicular cylinder axis. The presence inner results nonuniform annulus. An asymptotic ferrohydrodynamic assuming linear magnetization neglecting effect couple stresses indicated that should have dependence on frequency quadratic amplitude. To order approximation analysis, no bulk is expected annular gap between stationary cylinders. Experiments measured required...

En la industria de panela (denominada azúcar sin centrifugar por FAO), se estima que los evaporadores múltiple efecto (EME), permiten un mayor control e incrementan en 36 % eficiencia global del proceso. No obstante, implementación estas tecnologías requiere que, además ajuste técnico proceso, también mantenga calidad obtenida sistemas evaporación abierta. Condición ha develado vacío tecnológico respecto a influencia las complejas reacciones ocurren durante y concentración jugo sobre...

The flow of a ferrofluid between two parallel infinitely long plates generated by rotating magnetic field has been studied analytically and numerically using spin diffusion theory for broad range frequencies intensities the field. This work was motivated interest in obtaining better agreement theoretical predictions experimental observations dependence magnitude on amplitude frequency These discrepancies have attributed to use asymptotic solutions assess velocity profiles obtained moderate...

La simulación de una caldera industrial en CFD se realiza, usualmente, por etapas debido al gran tamaño y a los diferentes fenómenos físicos que ocurren dentro del equipo. En este trabajo, la parrilla realiza tres etapas, primera es el circuito aire primario, segunda secundario tercera corresponde caldera. combustión bagazo caña un fenómeno complejo involucra vaporización humedad, devolatilización carbón, forma para evaluar esos las partículas fueron modeladas marco Euleriano-Lagrangiano....

La implementación de evaporadores multiefecto en el proceso panelero requiere, además del ajuste tecnológico, mantener las características producto; esta condición develó desconocimiento efecto la presión evaporación sobre calidad panela. Para llenar parte este vacío, se buscó determinar tanto concentración antiespumante como uso floculante (Heliocarpus popayanensis Kunth) y coadyuvante (cal) miel panela, cuando realiza a presiones diferentes atmosférica. ello, trabajó dos diseños...

&lt;p style="margin: 0cm 0pt; text-align: justify; line-height: normal;"&gt;&lt;span style="letter-spacing: -0.1pt; font-family: 'Century Gothic','sans-serif'; font-size: 8pt; mso-bidi-font-size: 9.5pt; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: Arial; mso-fareast-language: ES; mso-bidi-language: EN-US;"&gt;Five different Colombian vacuum residues were thermally decomposed in a thermogravimetric analyzer. Three heating rates employed to heat the sample up 650°C. The...

This work is aimed to study the wax deposition process on internal surface of oil production pipelines and influence parameters such as flow rate pipe wall temperature deposit thickness for a light crude with high paraffinic content considering three different boundary conditions wall; two which assumed profile boundary, fact that has not been considered in previous works, third constant value. The analysis was conducted assuming pseudo steady fluid phase.&nbsp; finite differences method...

Al implementar el uso de evaporadores múltiple efecto (EME) al proceso panelero, además del ajuste tecnológico, se requiere mantener la calidad producto. Esta condición develó desconocimiento aspectos como aporte las diferencias composicionales en variedades caña a características panela. A fin llenar parte este vacío objetivo trabajo que aquí presenta fue determinar presión evaporación y variedad sobre Para lograrlo, trabajó un diseño experimental completamente azar con arreglo factorial...

This research presents a discussion of the flow ferrofluid in square cross-sectional area channel driven by rotating magnetic field. The objective was to evaluate coupled effect surface stresses and diffusion internal angular momentum as potential mechanisms for generating flow. In many analyses induced time-dependent fields, has been dismissed, based on negligible value spin viscosity coefficient estimated from order-of-magnitude analyses. light these considerations, we conducted review...

The integration of surfactants and nanoparticles in emulsion formulations has attracted significant attention due to their potential synergistic effects, improving stability enabling the development stimuli-responsive materials. objective this study was investigate stability, bulk rheological, magnetorheological properties oil water (o/w) emulsions, composed Fe3O4 kerosene-based ferrofluids dispersed surfactant solutions (hexadecylpyridinium chloride, nonylphenol polyethoxylate—ethylene...