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Computational Multiphase Flow for Energy Systems

Madhava SyamlalNETL

Reza Mostofi, UOP-Honeywell

Providing affordable, reliable and clean energy to meet a growing global demand is arguably one of the most pressing issues facing the world’s scientists and policymakers alike. To that end, a variety of technologies for the generation and utilization of fossil, renewable, and nuclear energy are under development. Multiphase flows are ubiquitous in such energy technologies, appearing in technologies for the extraction, conversion, storage and utilization of energy resources; e.g., foamed cements or hydraulic fracturing fluids used for extracting fossil energy, high-temperature particle receivers in concentrating solar power, bio-energy conversion reactors, chemical looping combustion, nuclear fuel particle coating, and sorbent and solvent reactors for capturing CO2 together with more efficient fossil fuel technologies. These flows consist of bubbles or particles suspended in a fluid, exchanging mass, momentum and energy and undergoing physicochemical changes. Large-scale commercial deployment of the technologies will require an understanding of how to scale laboratory designs of multiphase reactors and devices to industrial sizes. However, the direct scale up of such reactors is known to be unreliable. The current approach necessitates building and testing physical systems at increasingly larger intermediate scales. The cost in both dollars and development time of having to build and extensively test systems at multiple intermediate scales is prohibitive. Having the means to impact the design of multiphase reactors and devices early in the developmental process is critically important to control costs and reduce the risk of not meeting performance standards. The advent of faster computers and better numerical techniques have made multiphase reactors and devices amenable to detailed computational fluid dynamic modeling, and it also provides some more insights into such systems.
In this mini-symposium we invite submissions focusing on the development and application of numerical techniques for multiphase flow simulation pertaining to energy systems, including micro/meso-scale flows, granular/particulate flows, reacting flows, and plant-scale flows. The techniques used may include direct numerical simulation, discrete element method, lattice Boltzmann method, two-fluid model, multiphase particle in cell method and others .