Experimental Study of Fully Developed Laminar Flow in a Porous Pipe with Wall Injection

The effect of roughness ranging from smooth to 24% relative roughness on laminar flow has been examined in previous works by the authors. It was shown that using a constricted parameter, εFP, the laminar results were predicted well in the roughened channels ([1],[2],[3]). For the turbulent regime, Kandlikar et al. [1] proposed a modified Moody diagram by using the same set of constricted parameters, and using the modification of the Colebrook equation. A new roughness parameter εFP was shown to accurately portray the roughness effects encountered in laminar flow. In addition, a thorough look at defining surface roughness was given in Young et al. [4]. In this paper, the experimental study has been extended to cover the effects of different roughness features on pressure drop in turbulent flow and to verify the validity of the new parameter set in representing the resulting roughness effects. The range of relative roughness covered is from smooth to 10.38% relative roughness, with Reynolds numbers up to 15,000. It was found that using the same constricted parameters some unique characteristics were noted for turbulent flow over sawtooth roughness elements.

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Experimental study of the instability of laminar flow in a tube with deformable walls

Physics of Fluids ◽

10.1063/1.4907246 ◽

2015 ◽

Vol 27 (2) ◽

pp. 024102 ◽

Cited By ~ 22

Author(s):

R. Neelamegam ◽

V. Shankar

Keyword(s):

Experimental Study ◽

Laminar Flow ◽

Deformable Walls

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Experimental Study of a Laminar Flow Solid Desiccant Dehumidifier Driven by a Low Temperature Heat Source

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.819.361 ◽

2016 ◽

Vol 819 ◽

pp. 361-365 ◽

Cited By ~ 1

Author(s):

Seung Jin Oh ◽

Kyaw Thu ◽

Muhammad Wakil Shahzad ◽

Wongee Chun ◽

Kim Choon Ng

Keyword(s):

Experimental Study ◽

Low Temperature ◽

Laminar Flow ◽

Heat Source ◽

Silica Gel ◽

Average Diameter ◽

Hot Water ◽

Dry Air ◽

Temperature Heat ◽

Adsorption Desorption

In this paper, an experimental study of a laminar flow solid desiccant dehumidifier has been presented. The cyclic steady state performance of adsorption-desorption processes was analyzed at various heat source temperatures and typical ambient humidity conditions in tropics. The desiccant dehumidification system consists of two beds filled with silica gel, two heat exchangers operating at 30 oC and 80 oC respectively, three humidity stations for measurement of the temperature and humidity conditions of the system and a blower to make airflow throughout the system. Type-RD silica gel of 0.3 mm average diameter was used as the working desiccant in the dehumidification system. This system has no moving parts rendering less maintenance compared with a rotary type. It is also energy-efficient means of dehumidification by adsorption process with low temperature heat source as compared to the conventional methods. As a result, it was observed the humidity ratio of inlet air is reduced from 24 g/kg of dry air to about 17 g/kg of dry air. Concomitantly, hot water at 80 oC is used to regenerate the adsorbent.

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Experimental study of laminar flow in dusty plasma liquid

Physics Letters A ◽

10.1016/j.physleta.2004.12.075 ◽

2005 ◽

Vol 336 (4-5) ◽

pp. 378-383 ◽

Cited By ~ 45

Author(s):

A. Gavrikov ◽

I. Shakhova ◽

A. Ivanov ◽

O. Petrov ◽

N. Vorona ◽

...

Keyword(s):

Experimental Study ◽

Laminar Flow ◽

Dusty Plasma

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Extending the utility of perturbation series in problems of laminar flow in a porous pipe and a diverging channel

The Journal of the Australian Mathematical Society Series B Applied Mathematics ◽

10.1017/s0334270000011073 ◽

1999 ◽

Vol 41 (1) ◽

pp. 118-128 ◽

Cited By ~ 13

Author(s):

O. D. Makinde

Keyword(s):

Reynolds Number ◽

Laminar Flow ◽

Incompressible Fluid ◽

Taylor Series ◽

Flow Separation ◽

Viscous Incompressible Fluid ◽

Internal Flow ◽

Perturbation Series ◽

Porous Pipe ◽

Diverging Channel

AbstractIn this paper, we exploit a new series summation and convergence improvement technique (that is, Drazin and Tourigny [5]), in order to study the steady flow of a viscous incompressible fluid both in a porous pipe with moving walls and an exponentially diverging asymmetrical channel. The solutions are expanded into Taylor series with respect to the corresponding Reynolds number. Using the D-T method, the bifurcation and the internal flow separation studies are performed.

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