TY - GEN
T1 - Numerical Analysis of Transient Induced Flow Through Open Ended Tall Vertical Concentric Annulus
AU - Mustafa, Jawed
AU - Alqaed, Saeed
AU - Husain, Shahid
AU - Altamush Siddiqui, M.
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.
PY - 2024
Y1 - 2024
N2 - In this work, thermally induced water flow behavior in an open, tall, vertical annulus is carefully characterized using numerical analysis. The annuli in this study had aspect ratios of 1.184 and 352 (length to annular gap) (outer radius to inner radius). When constructing the machinery for nuclear reactor systems, the circular test sections with such a high aspect ratio are essential. The proprietary code employs a tried-and-true semi-implicit finite difference method as the numerical approach, which is based on the SMAC technique. The induced flow is brought on by a step change in the inner wall heat flux even while the exterior wall is assumed to be adiabatic. The Raleigh number (Ra) ranges from 1.1 × 104 to 6.6 × 105, although the Prandtl number (Pr) is 6.43. The research examines the impact of heating on the mass flow rate, pressure drop, and heat transfer coefficient among other design parameters. Along with the outcomes, a time-and location-based temperature and velocity profile is given. Additionally taken into account are the temporal fluctuations in induced flow and pressure distribution along the annulus.
AB - In this work, thermally induced water flow behavior in an open, tall, vertical annulus is carefully characterized using numerical analysis. The annuli in this study had aspect ratios of 1.184 and 352 (length to annular gap) (outer radius to inner radius). When constructing the machinery for nuclear reactor systems, the circular test sections with such a high aspect ratio are essential. The proprietary code employs a tried-and-true semi-implicit finite difference method as the numerical approach, which is based on the SMAC technique. The induced flow is brought on by a step change in the inner wall heat flux even while the exterior wall is assumed to be adiabatic. The Raleigh number (Ra) ranges from 1.1 × 104 to 6.6 × 105, although the Prandtl number (Pr) is 6.43. The research examines the impact of heating on the mass flow rate, pressure drop, and heat transfer coefficient among other design parameters. Along with the outcomes, a time-and location-based temperature and velocity profile is given. Additionally taken into account are the temporal fluctuations in induced flow and pressure distribution along the annulus.
KW - Closed loop thermo-siphon
KW - Constant heat flux
KW - High aspect ratio
KW - Natural convection
KW - Radius ratio
KW - Tall annulus
UR - http://www.scopus.com/inward/record.url?scp=85194761739&partnerID=8YFLogxK
U2 - 10.1007/978-981-99-7213-5_7
DO - 10.1007/978-981-99-7213-5_7
M3 - Conference contribution
AN - SCOPUS:85194761739
SN - 9789819972128
T3 - Lecture Notes in Mechanical Engineering
SP - 77
EP - 93
BT - Advances in Heat Transfer and Fluid Dynamics - Select Proceedings of AHTFD 2022
A2 - Siddiqui, Mohammad Altamush
A2 - Hasan, Nadeem
A2 - Tariq, Andallib
PB - Springer Science and Business Media Deutschland GmbH
T2 - 1st International Conference on Advances in heat Transfer and Fluid Dynamics, AHTFD 2022
Y2 - 1 December 2022 through 3 December 2022
ER -