Modeling a Porous Region for Natural Convection Heat Transfer and Experimental Validation in Slender Cylindrical Geometries

Noah, Olugbenga; Slabber, Johan F.M.; Meyer, Josua P.

doi:10.13182/nt15-56

Nuclear Technology

2016

DOI: 10.13182/nt15-56

|View full text |Cite

Modeling a Porous Region for Natural Convection Heat Transfer and Experimental Validation in Slender Cylindrical Geometries

Olugbenga Noah

Johan F.M. Slabber

Josua P. Meyer

Abstract: -Natural convection heat transfer in fluid-saturated porous media has in recent years

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2020

2023

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 20 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

Porosity Manipulation in Bottom-Enclosed Vertical Porous Structure to Improve Natural Convection Cooling Efficacy: A Computational Study

Dasgupta

Gupta

2020

Journal of Heat Transfer

View full text Add to dashboard Cite

Flow acceleration by imposing flow channelization structures like chimneys and/or solid barriers to improve natural convection cooling in pure fluids, is a well-known technique and a thoroughly investigated topic in thermal engineering. However, accelerating flow through porous media, by using such a passive technique, is challenging due to restriction imposed by the solid matrix to the erection of such structures. This study is a unique investigation into a passive method to accelerate flow in natural convection cooling through a bottom-enclosed porous medium with a vertical heated structure at the center, a configuration that is commonly encountered in industry. The porous domain is divided into distinct zones varying in porosity while retaining the average porosity of the original system, to ensure enough structural stability to the vertical heating element. Employing computational fluid dynamics (CFD) analyses, the study shows that the method has the potential to significantly improve natural convection cooling by accelerating flow in tall porous structures while at the same time improves mechanical stability of such structures.

show abstract

Porosity Manipulation in Bottom-Enclosed Vertical Porous Structure to Improve Natural Convection Cooling Efficacy: A Computational Study

Dasgupta

Gupta

2020

Journal of Heat Transfer

View full text Add to dashboard Cite

show abstract

Introducing Passive Nuclear Safety in Water-Cooled Reactors: Numerical Simulation and Validation of Natural Convection Heat Transfer and Transport in Packed Beds of Heated Microspheres

Noah

Slabber

Meyer

2023

Journal of Nuclear Engineering and Radiation Science

View full text Add to dashboard Cite

The development of an accident tolerant nuclear fuel for water-cooled reactors would re-defined the status of these reactors from traditional active safety to passive safety systems. As a possible solution towards enhancing the safety of light-water reactors (LWRs), loose-coated particles of enriched uranium dioxide fuel with the ability to retain gaseous and metallic fission products in the case of a loss of cooling event can be introduced inside Silicon-Carbide cladding tubes of the fuel assembly (see Fig.1a & b). These coated particles are treated as a bed from where heat is transferred to the cladding tube and helium gas movement is due to natural convection. A slender geometrical model with tube-to-particle diameter ratio N = 2.503 and porosity e = 0.546 mimicking the proposed nuclear fuel in the cladding was simulated. This study investigates the heat transfer characteristics and flow distribution under buoyancy driven force expected in the cladding tube of the proposed nuclear fuel using a commercial code. Random packing of particles is achieved by Discrete Element Method simulation. The temperature contours and velocity vector plots obtained can be said to be good illustration of anticipated heat transfer and transport phenomenon envisaged in the proposed fuel design. Simulated results for particle-to-fluid heat transfer coefficient, Nusselt number,and Rayleigh number which are of prime importance when analyzing natural convection heat transfer performance in fixed bed reactors were validated. Results obtained are in close agreement with established numerical and experimental works.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Modeling a Porous Region for Natural Convection Heat Transfer and Experimental Validation in Slender Cylindrical Geometries

Abstract: -Natural convection heat transfer in fluid-saturated porous media has in recent years

Cited by 2 publications

References 20 publications

Porosity Manipulation in Bottom-Enclosed Vertical Porous Structure to Improve Natural Convection Cooling Efficacy: A Computational Study

Porosity Manipulation in Bottom-Enclosed Vertical Porous Structure to Improve Natural Convection Cooling Efficacy: A Computational Study

Introducing Passive Nuclear Safety in Water-Cooled Reactors: Numerical Simulation and Validation of Natural Convection Heat Transfer and Transport in Packed Beds of Heated Microspheres

Contact Info

Product

Resources

About