TY - GEN
T1 - Large eddy simulation of turbulent mass transfer in ribbed pipe flow
AU - Kang, Changwoo
AU - Yang, Kyung Soo
PY - 2012
Y1 - 2012
N2 - Understanding heat/mass transfer mechanisms in turbulent flow is essential for solving many engineering problems. From the view point of heat/mass transfer control, surface roughness is popular for enhancing heat/mass transfer in turbulent pipe flow, relevant to heat exchangers, mixers, and nuclear reactors to name a few. Such a surface roughness is often modeled with a rib. In the current investigation, the flow and concentration fields from the LES data base were analyzed in detail. The profiles of mean velocity components, mean concentration, root-mean-squares (rms) of concentration fluctuations are presented at the selected streamwise locations downstream of a rib. In comparison with the straight-pipe case at the same Re and Sc, the effects of the ribs are clearly identified, leading to overall enhancement of turbulent mass transfer. The budget of concentration variance was computed and presented in the form of contours. Our LES results shed light on a complete understanding of the mass-transfer mechanisms in turbulent ribbed-pipe flow which has numerous applications in engineering.
AB - Understanding heat/mass transfer mechanisms in turbulent flow is essential for solving many engineering problems. From the view point of heat/mass transfer control, surface roughness is popular for enhancing heat/mass transfer in turbulent pipe flow, relevant to heat exchangers, mixers, and nuclear reactors to name a few. Such a surface roughness is often modeled with a rib. In the current investigation, the flow and concentration fields from the LES data base were analyzed in detail. The profiles of mean velocity components, mean concentration, root-mean-squares (rms) of concentration fluctuations are presented at the selected streamwise locations downstream of a rib. In comparison with the straight-pipe case at the same Re and Sc, the effects of the ribs are clearly identified, leading to overall enhancement of turbulent mass transfer. The budget of concentration variance was computed and presented in the form of contours. Our LES results shed light on a complete understanding of the mass-transfer mechanisms in turbulent ribbed-pipe flow which has numerous applications in engineering.
UR - https://www.scopus.com/pages/publications/84892654213
U2 - 10.1115/HT2012-58163
DO - 10.1115/HT2012-58163
M3 - Conference paper
AN - SCOPUS:84892654213
SN - 9780791844786
T3 - ASME 2012 Heat Transfer Summer Conf. Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
SP - 969
EP - 974
BT - ASME 2012 Heat Transfer Summer Conf. Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
T2 - ASME 2012 Heat Transfer Summer Conference Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
Y2 - 8 July 2012 through 12 July 2012
ER -