Experimental study and CFD simulation of wall effects on heat transfer of an extrudate multi-lobe particle

Zare, M.; Hashemabadi, Seyed Hassan

doi:10.1016/j.icheatmasstransfer.2013.02.010

Cited by 14 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accordingly, as displayed, there is a good agreement between experimental data and CFD results with an average deviation of 6.15 % and 5.01 % when the particle is located in the center of the bed and close to the bed wall, respectively. Note, the underprediction of the simulated data may be attributed to a systematic error caused by naphthalene sublimation during the loading and unloading of the particle in the bed 86.…”

Section: Resultsmentioning

confidence: 98%

“…As outlined earlier, the simulation results were validated with experimental data according to our previously developed approach 86 where the Nusselt numbers obtained from the simulation were compared with the data acquired from experiments based on Eq. (S4) (see Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…A reliable experimental method was previously developed by our group to validate the CFD simulation 42–46, 85, 86. A benchmark experimental setup was employed to study naphthalene sublimation from the particle surface (see Supporting Information, Sect.…”

Section: Experimental and Modelingmentioning

confidence: 99%

See 2 more Smart Citations

Heat Transfer at a Particle‐Tube Wall Contact Point: Impact of Catalyst Configuration on Hot Spots

2021

View full text Add to dashboard Cite

Hot spots tend to cause serious problems owing to probable damages to the reactor wall in intense endothermic reactions leading to safety concerns and enormous repairing costs. The heat transfer of a single cylindrical particle is studied empirically and numerically to evaluate hot spot creation close to the bed wall. Computational fluid dynamcis (CFD) methodology is used to solve the momentum, continuity, and energy equations simultaneously. The newly developed experimental method is applied to validate simulation data using the Chilton‐Colburn analogy. The particle rotation over the X, Y, and Z axes is studied and analysis of variance (ANOVA) is employed to statistically investigate the particle rotation effects on the dimensionless maximum temperature of the reactor wall.

show abstract

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Heat Transfer at a Particle‐Tube Wall Contact Point: Impact of Catalyst Configuration on Hot Spots

2021

View full text Add to dashboard Cite

show abstract

“…In this way, the specie concentrations were calculated locally on each plane by Equation (11), where Y is the mass or mole fraction of the reacting specie. The resulting axial profiles of bulk temperature and species are suitable for direct comparisons to 1D model results.…”

Section: Boundary Conditions and Simulation Parametersmentioning

confidence: 99%

Verification of Heat and Mass Transfer Closures in Industrial Scale Packed Bed Reactor Simulations

et al. 2018

View full text Add to dashboard Cite

Particle-resolved direct numerical simulation (PR-DNS) is known to provide an accurate detailed insight into the local flow phenomena in static particle arrays. Most PR-DNS studies in literature do not account for reactions taking place inside the porous particles. In this study, PR-DNS is performed for catalytic reactions inside the particles using the multifluid approach where all heat and mass transfer phenomena are directly resolved both inside and outside the particles. These simulation results are then used to verify existing 1D model closures from literature over a number of different reaction parameters including different reaction orders, multiple reactions and reactants, interacting reactions, and reactions involving gas volume generation/consumption inside the particle. Results clearly showed that several modifications to existing 1D model closures are required to reproduce PR-DNS results. The resulting enhanced 1D model was then used to accurately simulate steam methane reforming, which includes all of the aforementioned reaction complexities. The effect of multiple reactants was found to be the most influential in this case.

show abstract

“…There are also some studies concerning CFD simulations of heat transfer in nanofluids (Fard et al, 2010;Utomo et al, 2012), objects inserted in fluid flow (Defraeye et al, 2010;Zare and Hashemabadi, 2013) or heat exchange enhancement (Eesa and Barigou, 2010;van Goethem and Jelsma, 2014).…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics and Experimental Studies of a New Mixing Element in a Static Mixer as a Heat Exchanger

Konopacki¹,

Kordas²,

Fijałkowski³

et al. 2015

Chemical and Process Engineering

View full text Add to dashboard Cite

The main aim of this work is to study the thermal efficiency of a new type of a static mixer and to analyse the flow and temperature patterns and heat transfer efficiency. The measurements were carried out for the static mixer equipped with a new mixing insert. The heat transfer enhancement was determined by measuring the temperature profiles on each side of the heating pipe as well as the temperature field inside the static mixer. All experiments were carried out with varying operating parameters for four liquids: water, glycerol, transformer oil and an aqueous solution of molasses. Numerical CFD simulations were carried out using the two-equation turbulence k-ω model, provided by ANSYS Workbench 14.5 software. The proposed CFD model was validated by comparing the predicted numerical results against experimental thermal database obtained from the investigations. Local and global convective heat transfer coefficients and Nusselt numbers were detrmined. The relationship between heat transfer process and hydrodynamics in the static mixer was also presented. Moreover, a comparison of the thermal performance between the tested static mixer and a conventional empty tube was carried out. The relative enhancement of heat transfer was characterised by the rate of relative heat transfer intensification.

show abstract

Experimental study and CFD simulation of wall effects on heat transfer of an extrudate multi-lobe particle

Cited by 14 publications

References 34 publications

Heat Transfer at a Particle‐Tube Wall Contact Point: Impact of Catalyst Configuration on Hot Spots

Heat Transfer at a Particle‐Tube Wall Contact Point: Impact of Catalyst Configuration on Hot Spots

Verification of Heat and Mass Transfer Closures in Industrial Scale Packed Bed Reactor Simulations

Computational Fluid Dynamics and Experimental Studies of a New Mixing Element in a Static Mixer as a Heat Exchanger

Contact Info

Product

Resources

About