TY - JOUR
T1 - Investigation on optimization of the thermal performance for compressible laminar natural convection flow in open-ended vertical channel
AU - Talukdar, Deboprasad
AU - Li, Chung Gang
AU - Tsubokura, Makoto
N1 - Funding Information:
The authors wish to acknowledge the scholarship (Scholarship No. 91606000758) support received from the Ministry of Education, Culture, Sports Science and Technology ( MEXT ), Japan. A part of this research was supported by MEXT as “Priority Issue on post-K computer” (Development of Innovative Design and Production Processes that would lead the way for the manufacturing industry in near future.
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/1
Y1 - 2019/1
N2 - The present paper focuses on the optimization of the thermal performance for compressible laminar natural convection flow induced under high-temperature difference in an open-ended vertical channel by optimizing the channel inter-plate spacing using numerical simulation. The present investigation is conducted for a wide range of Rayleigh number (Ra) 104 to 107 in channel heated asymmetrically by uniform surface temperature with air (Pr0.72) as working fluid. Several values of channel gap between plates, new modified preconditioned all-speed Roe scheme along with dual time stepping technique and modified Local One-dimensional Inviscid (LODI) relations as channel inlet and outlet boundary conditions suitable for compressible laminar natural convection is employed for the current simulation. Heat transfer rate in terms of average Nusselt number is obtained for all Rayleigh number and channel aspect ratio is obtained. Variation of thermal and velocity profiles, the variation of average Nusselt number and mass flow rate into the channel for the combination of each Rayleigh number and channel aspect ratio is reported. From the results obtained, a correlation for optimum aspect ratio with Rayleigh number which maximizes the heat transfer within the channel is presented.
AB - The present paper focuses on the optimization of the thermal performance for compressible laminar natural convection flow induced under high-temperature difference in an open-ended vertical channel by optimizing the channel inter-plate spacing using numerical simulation. The present investigation is conducted for a wide range of Rayleigh number (Ra) 104 to 107 in channel heated asymmetrically by uniform surface temperature with air (Pr0.72) as working fluid. Several values of channel gap between plates, new modified preconditioned all-speed Roe scheme along with dual time stepping technique and modified Local One-dimensional Inviscid (LODI) relations as channel inlet and outlet boundary conditions suitable for compressible laminar natural convection is employed for the current simulation. Heat transfer rate in terms of average Nusselt number is obtained for all Rayleigh number and channel aspect ratio is obtained. Variation of thermal and velocity profiles, the variation of average Nusselt number and mass flow rate into the channel for the combination of each Rayleigh number and channel aspect ratio is reported. From the results obtained, a correlation for optimum aspect ratio with Rayleigh number which maximizes the heat transfer within the channel is presented.
UR - http://www.scopus.com/inward/record.url?scp=85053410339&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85053410339&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatmasstransfer.2018.09.034
DO - 10.1016/j.ijheatmasstransfer.2018.09.034
M3 - Article
AN - SCOPUS:85053410339
SN - 0017-9310
VL - 128
SP - 794
EP - 806
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
ER -