Search Results - "Shahnam, Mehrdad"

CFD-DEM study of effect of bed thickness for bubbling fluidized beds by Li, Tingwen, Gopalakrishnan, Pradeep, Garg, Rahul, Shahnam, Mehrdad

“…The effect of bed thickness in rectangular fluidized beds is investigated through the CFD-DEM simula- tions of small-scale systems. Numerical results are…”
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Progress in high-temperature electrolysis for hydrogen production using planar SOFC technology by Herring, J. Stephen, O’Brien, James E., Stoots, Carl M., Hawkes, G.L., Hartvigsen, Joseph J., Shahnam, Mehrdad

“…Experimental and modeling activities were performed, addressing the performance of solid-oxide cells, operating in steam electrolysis mode for hydrogen…”
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Modeling Average Pressure and Volume Fraction of a Fluidized Bed Using Data-Driven Smart Proxy by Ansari, Mohaghegh, Shahnam, Dietiker

“…Simulations can reduce the time and cost to develop and deploy advanced technologies and enable their rapid scale-up for fossil fuel-based energy systems…”
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Simulations of biomass pyrolysis using glued-sphere CFD-DEM with 3-D intra-particle models by Lu, Liqiang, Gao, Xi, Shahnam, Mehrdad, Rogers, William A.

“…•Shaped Resolved CFD-DEM was coupled with 3-D intra-particle model.•Influences of biomass shapes and sizes on pyrolysis were investigated.•Pyrolysis in fixed…”
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Bridging particle and reactor scales in the simulation of biomass fast pyrolysis by coupling particle resolved simulation and coarse grained CFD-DEM by Lu, Liqiang, Gao, Xi, Shahnam, Mehrdad, Rogers, William A.

“…[Display omitted] •The fluidized bed biomass pyrolizer was simulated using multi-scale CFD.•The heat transfer correlation and reaction kinetics were calibrated…”
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Editorial: Special Issue by Shahnam, Mehrdad

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Machine learning accelerated discrete element modeling of granular flows by Lu, Liqiang, Gao, Xi, Dietiker, Jean-François, Shahnam, Mehrdad, Rogers, William A.

“…•Simulation of granular flows with Convolution Neural Network.•Physics-inspired multi-scale loss function improved the stability and accuracy.•Using more…”
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MFiX based multi-scale CFD simulations of biomass fast pyrolysis: A review by Lu, Liqiang, Gao, Xi, Dietiker, Jean-François, Shahnam, Mehrdad, Rogers, William A.

“…•Review of biomass pyrolysis kinetics, intra-particle, drag, and heat transfer models.•Review of machine learning enhanced biomass pyrolysis…”
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Transient simulation of biomass combustion in a circulating fluidized bed riser by Banerjee, Subhodeep, Shahnam, Mehrdad, Rogers, William A., Hughes, Robin W.

“…Interest in circulating fluidized bed (CFB) boilers as a power generation technology has sky-rocketed in recent years because of several advantages this…”
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Transient simulation of biomass combustion in a circulating fluidized bed riser by Banerjee, Subhodeep, Shahnam, Mehrdad, Rogers, William A., Hughes, Robin W.

“…Interest in circulating fluidized bed (CFB) boilers as a power generation technology has sky-rocketed in recent years because of several advantages this…”
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Investigating biomass composition and size effects on fast pyrolysis using global sensitivity analysis and CFD simulations by Lu, Liqiang, Gao, Xi, Gel, Aytekin, Wiggins, Gavin M., Crowley, Meagan, Pecha, Brennan, Shahnam, Mehrdad, Rogers, William A., Parks, James, Ciesielski, Peter N.

“…It is notoriously difficult to build an accurate universal model for biomass pyrolysis due to its sensitivity to a wide number of critical material attributes…”
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Multiscale CFD simulation of biomass fast pyrolysis with a machine learning derived intra-particle model and detailed pyrolysis kinetics by Lu, Liqiang, Brennan Pecha, M., Wiggins, Gavin M., Xu, Yupeng, Gao, Xi, Hughes, Bryan, Shahnam, Mehrdad, Rogers, William A., Carpenter, Daniel, Parks, James E.

“…•Multiscale simulation of biomass pyrolysis with ANN regressed intra-particle model.•Validation with four different biomass feedstocks.•Coarse grained DEM…”
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Experimental and numerical investigation of sands and Geldart A biomass co‐fluidization by Lu, Liqiang, Yu, Jia, Gao, Xi, Xu, Yupeng, Shahnam, Mehrdad, Rogers, William A.

“…This article investigated the fluidization of sands and small Geldart A biomass mixtures. The mixture fluidized like Geldart A type particles with a uniform…”
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Open source implementation of glued sphere discrete element method and nonspherical biomass fast pyrolysis simulation by Lu, Liqiang, Gao, Xi, Shahnam, Mehrdad, Rogers, William A.

“…In this research, a glued‐sphere discrete element method was implemented in the open‐source, computational fluid dynamics software MFiX. The implementation was…”
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Coarse grained computational fluid dynamic simulation of sands and biomass fluidization with a hybrid drag by Lu, Liqiang, Gao, Xi, Shahnam, Mehrdad, Rogers, William A.

“…The bubbling fluidized bed reactor is widely used in fast pyrolysis of biomass. Discrete simulation of this reactor is challenging due to many sand particles…”
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Coarse-Grained CFD-DEM Simulation and the Design of an Industrial-Scale Coal Gasifier by Yu, Jia, Lu, Liqiang, Xu, Yupeng, Gao, Xi, Shahnam, Mehrdad, Rogers, William

“…Industrial-scale gasifiers are traditionally designed using performance data from small-scale systems and expert experiences. In this research, the…”
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CFD simulations of circulating fluidized bed risers, part II, evaluation of differences between 2D and 3D simulations by Li, Tingwen, Pannala, Sreekanth, Shahnam, Mehrdad

“…Two-dimensional (2D) numerical simulations have been widely reported in the literature for qualitative, even quantitative, study of the complex gas–solids flow…”
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Redox-Based Chemical Looping Large-Scale Air Separation Unit Designs Using Perovskite Material by Konan, N’dri Arthur, Clarke, Mary Ann, Aziz, Hossain, Shahnam, Mehrdad

“…Oxygen production by means of air separation through redox cycle reactions of Sr1–x Ca x FeO3−δ perovskite particles is examined numerically in the context of…”
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Experimental validation of a multiphase flow model of a lab-scale fluidized-bed gasification unit by Porcu, Andrea, Xu, Yupeng, Mureddu, Mauro, Dessì, Federica, Shahnam, Mehrdad, Rogers, William A., Sastri, Bhima S., Pettinau, Alberto

“…[Display omitted] •CFD modelling of bubbling fluidized-bed gasification as a support for process design.•Experimental validation in a lab-scale unit in…”
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Bridging particle and reactor scales in the simulation of biomass fast pyrolysis by coupling particle resolved simulation and coarse grained CFD-DEM by Lu, Liqiang, Gao, Xi, Shahnam, Mehrdad, Rogers, William A.

“…Efficient utilization of biomass is challenging due to the complexity of the feedstock at molecular, particle, and reactor scales. Direct coupling of particle…”
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