Oscillatory viscous flow in symmetric wavy-walled channels

Nishimura, Tatsuo; Arakawa, Shingho; Murakami, Shinichiro; Kawamura, Yoshiharu

doi:10.1016/0009-2509(89)85148-6

Cited by 43 publications

(21 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the batch OBTA can also be used as a simple test of the performance of wax inhibitors if we first understand the inhibited system. As to the question of how to apply oscillatory motion via oscillating baffles in existing pipelines, similar mixing conditions can be achieved using tubes/pipes with corrugated walls [46,47] at the …”

Section: Methodsmentioning

confidence: 99%

On the effect of wax content on paraffin wax deposition in a batch oscillatory baffled tube apparatus

Ismail

Westacott

2008

Chemical Engineering Journal

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

On the effect of wax content on paraffin wax deposition in a batch oscillatory baffled tube apparatus

Ismail

Westacott

2008

Chemical Engineering Journal

View full text Add to dashboard Cite

“…This implies that the flows are in the "inertia-dominated flow regime," which were pointed out in the studies of oscillatory flow [Q s = 0 in Eq. (1)] by Sobey [13] and Nishimura et al [14]. The tracer behavior indicates that the flow regime causes mass transfer enhancement, while under the higher Strouhal number condition, we can recognize the occurrence of "viscosity-dominated flow regime," where the suppression of the vortex motion reduces mass transfer rate, seen from the remarkable accumulation of tracer in the groove's upstream side at St F = 2.45 and the stagnation of tracer in the groove at St F = 3.43.…”

Section: Mass Transfer Enhancement By Pulsatile Flowsmentioning

confidence: 99%

Mass transfer enhancement by pulsatile flows in grooved channels (the effects of groove length on the resonant mass transfer enhancement)

Kunitsugu

Nishimura

Tanoue

2008

Heat Trans. Asian Res.

Self Cite

View full text Add to dashboard Cite

The effect of groove length on the resonant mass transfer enhancement by pulsatile flow in grooved channel at intermediate Reynolds number was studied for five channels using experimental methods. The mass transport processes from the bottom of the groove to the channel were visualized by an electrolytic precipitation method, and overall and local mass transfer rates were measured by electrochemical methods with a high Schmidt number fluid. The qualitative and quantitative observations show that the range of Strouhal numbers, which gives inertia-dominated flow, is extended to the low-value region with groove length. Moreover, it is revealed that a noticeable enhancement is obtained in a specific channel at a Reynolds number for a wide range of Strouhal numbers. The results indicate that there is a specific Reynolds number for transfer enhancement in a channel.

show abstract

“…In some of the examples described in the Introduction (e.g., oil transmission lines), the implementation of oscillatory motion via oscillating baffles in existing equipment may be impossible or impractical; however, similar mixing conditions would be achieved using tubes/pipes with corrugated walls 43,44 at the appropriate flow rate of the fluid. Hence an equivalent level of reduction in deposition would be realised.…”

Section: With Baffles and Oscillationmentioning

confidence: 99%

On the characterisation of wax deposition in an oscillatory baffled device

Ismail

Westacott

2006

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Deposition from viscous fluids in industrial processes is a major nuisance during production of many useful materials ranging from oil to foodstuffs. In a cold-wall scenario rapid deposition of gel-like material causes restriction, processing delays and potentially reduction in product quality. One well-known example of this phenomenon is paraffin wax deposition, which is one of the greatest challenges in the petroleum industry, where the main implication is the blockage of oil. The aim of this work was to investigate the effect of applying oscillation on wax deposition, with the main focuses on the effects of oscillation frequencies and amplitudes, as well as the volume of the wax-oil mixture. Wax deposit formation was measured gravimetrically. The results indicate that baffles and oscillation reduce wax deposition; increasing both oscillation frequency and amplitude result in a decrease in wax deposition; and the degree of reduction is greater with changing oscillation amplitude than with frequency. It was also found that deposition on the column wall rather than the baffles was the main contribution to the total wax deposit.

show abstract

Oscillatory viscous flow in symmetric wavy-walled channels

Cited by 43 publications

References 20 publications

On the effect of wax content on paraffin wax deposition in a batch oscillatory baffled tube apparatus

On the effect of wax content on paraffin wax deposition in a batch oscillatory baffled tube apparatus

Mass transfer enhancement by pulsatile flows in grooved channels (the effects of groove length on the resonant mass transfer enhancement)

On the characterisation of wax deposition in an oscillatory baffled device

Contact Info

Product

Resources

About