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Journal articles on the topic 'Porous tubes'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Li, Yong, Ke Long Zhang, Hai Kun Tao, and Wei Jian Lv. "Experimental Study on Pool Boiling Heat Transfer Characteristics of Porous Surface Tube." Applied Mechanics and Materials 192 (July 2012): 24–28. http://dx.doi.org/10.4028/www.scientific.net/amm.192.24.

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The pooling boiling plays an important role in the operation of the passive residual heat removal heat exchanger (PRHR HX). At present, smooth tubes are still widely used as boiling element in the PRHR HX; there is great extension to improve the security and miniaturize the size of PRHR HX if the smooth tubes were replaced by porous surface tubes. In this paper, the pool boiling heat transfer characteristics of porous surface tube was researched experimentally. The result shows that the porous surface tube can enhance the pooling boiling significantly: Compared with the smooth tube, the porous

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2

Wang, Han, Long Bo Tian, and Hai Hao. "Integrated Computation and Preparation Optimization of In Situ Ordered Porous Aluminum Filled Tubes." Materials Science Forum 993 (May 2020): 857–62. http://dx.doi.org/10.4028/www.scientific.net/msf.993.857.

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As a kind of structural and functional composite material, foam filled tubes have an application prospect in automobile industry because it meets the requirements of automobile light weight and safety performance. The traditional preparation method of foam filled tubes is ex-situ preparation and there is no metallurgical bonding between the ordered porous aluminum filler and the thin-walled tube. In this study, the in-situ ordered porous aluminum filled tubes were proposed and prepared by combining the additive manufacturing technique and infiltration casting technique. The sand preform fabric

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3

Saboor, Meysam, and Hamidreza Khakrah. "Investigation of Thermal Efficiency Tubes with Porous Baffles." International Academic Journal of Science and Engineering 06, no. 01 (2019): 67–71. http://dx.doi.org/10.9756/iajse/v6i1/1910006.

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4

Ochiai, Tsuyoshi, Shoko Tago, Hiromasa Tawarayama, Toshifumi Hosoya, Hitoshi Ishiguro, and Akira Fujishima. "Fabrication of a Porous TiO2-Coated Silica Glass Tube and Its Application for a Handy Water Purification Unit." International Journal of Photoenergy 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/584921.

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A simple, handy, reusable, and inexpensive water purification unit including a one-end sealed porous amorphous-silica (a-silica) tube coated with 2 μm of porous TiO2photocatalyst layers has been developed. Both TiO2and a-silica layers were formed through outside vapor deposition (OVD). Raman spectrum of the porous TiO2-coated a-silica glass tube indicated that the anatase content of the TiO2layers of the tube was estimated to be approximately 60 wt%. Developed porous TiO2-coated a-silica glass tube has been assayed for the tube filtering feature againstEscherichia coli(E. coli) solution used a

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5

Liu, Shaomin. "Thin porous glass tubes." Materials Chemistry and Physics 103, no. 1 (2007): 147–52. http://dx.doi.org/10.1016/j.matchemphys.2007.02.004.

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6

Liu, Jing Lei, Yu Lin Dai, Xiang Ming Xia, Hong Xu, and Xue Sheng Wang. "Manufacture and Application of High Efficiency Boiling Tube for Heat Exchanger." Advanced Materials Research 236-238 (May 2011): 1640–44. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.1640.

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Surface with micro-porous layer can enhance the boiling heat transfer efficiency of tube. The novel nucleate boiling tubes were manufactured by sinter-bonding metal particles on the outside surface. Two conventional bare tube reboilers were revamped with the novel tubes. Industrial application revealed that the revamps effectively increased the heat duty of reboilers with small heat transfer area and reduced heat transfer temperature difference across the heat exchanger. Porous surface tube was beneficial to heat transfer and operating cost.

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7

Srinivasan, Vijayaragham, Kambiz Vafai, and Richard N. Christensen. "Analysis of Heat Transfer and Fluid Flow Through a Spirally Fluted Tube Using a Porous Substrate Approach." Journal of Heat Transfer 116, no. 3 (1994): 543–51. http://dx.doi.org/10.1115/1.2910905.

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An innovative approach was opted for modeling the flow and heat transfer through spirally fluted tubes. The model divided the flow domain into two regions. The flutes were modeled as a porous substrate with direction-dependent permeabilities. This enabled modeling the swirl component in the fluted tube. The properties of the porous substrate such as its thickness, porosity, and ratio of the direction-dependent permeabilities were obtained from the geometry of the fluted tube. Experimental data on laminar Nusselt numbers and friction factors for different types of fluted tubes representing a br

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8

Cieśliński, Janusz T., and Tomasz Z. Kaczmarczyk. "Pool boiling of nanofluids on rough and porous coated tubes: experimental and correlation." Archives of Thermodynamics 35, no. 2 (2014): 3–20. http://dx.doi.org/10.2478/aoter-2014-0010.

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Abstract The paper deals with pool boiling of water-Al2O3 and water- Cu nanofluids on rough and porous coated horizontal tubes. Commercially available stainless steel tubes having 10 mm outside diameter and 0.6 mm wall thickness were used to fabricate the test heater. The tube surface was roughed with emery paper 360 or polished with abrasive compound. Aluminium porous coatings of 0.15 mm thick with porosity of about 40% were produced by plasma spraying. The experiments were conducted under different absolute operating pressures, i.e., 200, 100, and 10 kPa. Nanoparticles were tested at the con

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9

Mohammad, F. S. "Porous-Tube Subsurface Irrigation." Journal of Agricultural and Marine Sciences [JAMS] 3, no. 2 (1998): 49. http://dx.doi.org/10.24200/jams.vol3iss2pp49-57.

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This research was conducted to study the factors leading to the uniform distribution of water from a subsurface irrigation system using porous tubes. The factors included the depth at which the tubes are installed, operating pressure, depth of impermeable layer, and a gravel envelope surrounding the tubes. A laboratory soil tank was constructed to determine the effect of these factors. The tank was filled with sand and fitted with porous tubes. The tank and the tubes represent a section of soil profile. The results of this study showed that the depth of the impermeable layer affected significa

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10

Chen, Chun Hong, K. Takita, Satoshi Ishiguro, Sawao Honda, and Hideo Awaji. "Fabrication and Characterization of Porous Alumina Tube with Pore Gradient." Materials Science Forum 492-493 (August 2005): 755–60. http://dx.doi.org/10.4028/www.scientific.net/msf.492-493.755.

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The porous alumina tube with pore gradient along the radial direction was successfully fabricated, where PMMA particles were used as pore former agent. The specimen was expected as a filter subjected to high temperatures. Alumina and PMMA particle were mixed with water to form aqueous slurry, compacted using centrifugal molding technique. The green body was dried in partial vacuum atmosphere, calcinated at 273 K to remove the organic component, sintered at 1623 K to obtain sintered porous a-alumina tubes. The control on the pore gradient of porous tubes was attempted by two ways; lamination an

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11

Jha, Basant K., and Yahaya J. Danjuma. "Transient Dean flow in a channel with suction/injection: A semi-analytical approach." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 233, no. 5 (2019): 1036–44. http://dx.doi.org/10.1177/0954408919825718.

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The mathematical model responsible for fully developed laminar transient flow formation between the gaps of two stationary concentric porous tubes due to the imposition of azimuthal pressure gradient (Dean flow) is solved semi-analytically. The tubes walls are porous so that a radial flow can be superimposed. The solution of the momentum and continuity equations are obtained semi-analytically by using the combination of Laplace transform technique and a Laplace inversion method called Riemann sum approximation method. The solutions for skin friction at [Formula: see text] (outer surface of the

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12

Wang, Xue Sheng, Zheng Bian Wang, and Qin Zhu Chen. "Research on Manufacturing Technology and Heat Transfer Characteristics of Sintered Porous Surface Tubes." Advanced Materials Research 97-101 (March 2010): 1161–65. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.1161.

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A new process for manufacturing sintered porous surface tube has been developed. By using this technology, three kinds of sintered porous surface tubes were fabricated, which base material was carbon steel and the sintered layer was bronze powder. And their boiling heat transfer characteristics were investigated experimentally. The experimental results indicated that the boiling heat transfers coefficient and the heat flux of these porous surfaces tubes were increased by 8~14 times and 5~8 times respectively compared with the smooth one. Finally, a new high flux heat exchanger was designed and

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13

Jeon, Soon-Hyeok, Hee-Sang Shim, Ji-Min Lee, Jeoh Han, and Do Haeng Hur. "Simulation of Porous Magnetite Deposits on Steam Generator Tubes in Circulating Water at 270 °C." Crystals 10, no. 9 (2020): 729. http://dx.doi.org/10.3390/cryst10090729.

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In the secondary side of pressurized water reactors (PWRs), the main corrosion product accumulated on the steam generator (SG) tubes is magnetite, which has a porous structure. The purpose of this work is to simulate the porous magnetite deposited to the SG tubes using a loop system. We newly developed a circulating loop system for a porous magnetite deposition test. A test section was designed as a single hydraulic flow channel, and a cartridge heater was fabricated and mounted into a commercial SG tube to provide an equal heating source for the primary water. After the deposition test, the s

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14

Yildiz, Sebiha. "Effect of length-to-diameter ratio on critical heat flux in porous-coated tubes." Thermal Science, no. 00 (2019): 462. http://dx.doi.org/10.2298/tsci190426462y.

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The critical heat flux (CHF) occurring during upflow of boiling water in vertical smooth and porous-coated tubes were investigated experimentally. The experiments were performed at low pressures from 0.11 to 0.7 MPa and at mass fluxes from 100 to 400 kg/m2s, with inlet subcoolings from 1 to 70 K. The experiments were carried out with four test sections, two of which were porous coated by sintering. The two tubes in each of the cases, porous and smooth, had the same geometries (L/D = 28.3; L/D = 38.75) to ensure a direct comparison of the measured data in the porous-coated tubes with those of t

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15

Alkam, M. K., and M. A. Al-Nimr. "Solar Collectors with Tubes Partially Filled with Porous Substrates." Journal of Solar Energy Engineering 121, no. 1 (1999): 20–24. http://dx.doi.org/10.1115/1.2888137.

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In this work, the thermal performance of a conventional collector is improved by inserting porous substrates at the inner walls of the collector tubes. The porous substrates improve the convective heat transfer coefficient between the tube wall and the fluid. This improvement is investigated numerically and its effects on the efficiency and the useful gain of the collector are evaluated. It is found that inserting the porous substrate may raise the collector efficiency considerably, especially at high values of the overall heat loss coefficient.

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16

Evin, Duygu. "Paraboloid-Based Spouted Bed Drying of Paddy: Aerodynamics, Temperature Distribution, and Moisture Degradation." AgriEngineering 1, no. 2 (2019): 257–64. http://dx.doi.org/10.3390/agriengineering1020019.

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Aerodynamics, temperature variations in the annulus, and the moisture reduction of paddy in a paraboloid-based spouted bed (PBSB) dryer without draft tube and with solid and porous draft tubes were investigated. Draft tube caused a rapid decrease in the peak pressure drop and minimum spouting velocity when compared with PBSB without a draft tube. Pressure drops with draft tubes were 17 to 30% of the values for the PBSB without a draft tube. Temperature distribution along the bed height in the annular region during drying of paddy was also investigated. Heat-up in the spouted bed without draft

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17

Rencken, G. E., and C. A. Buckley. "Dewatering Sludges Using a Novel Membrane Technology." Water Science and Technology 25, no. 10 (1992): 41–54. http://dx.doi.org/10.2166/wst.1992.0236.

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A novel tubular configured filter press has been developed for the filtration or dewatering of sludges. The unique features of this filter press are:during the cake deposition stage, sludge is fed under pressure into a self-supporting array of horizontal collapsible porous fabric tubes (the cake is deposited on the internal walls of the tubes).during the cake removal stage, sludge is pumped through the array of tubes at a high velocity and the cake is dislodged from the tube walls by means of a roller cleaning device which traverses the length of the array of porous tubes. The dislodged cake,

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18

Gong, Dawei, Craig A. Grimes, Oomman K. Varghese, et al. "Titanium oxide nanotube arrays prepared by anodic oxidation." Journal of Materials Research 16, no. 12 (2001): 3331–34. http://dx.doi.org/10.1557/jmr.2001.0457.

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Titanium oxide nanotubes were fabricated by anodic oxidation of a pure titanium sheet in an aqueous solution containing 0.5 to 3.5 wt% hydrofluoric acid. These tubes are well aligned and organized into high-density uniform arrays. While the tops of the tubes are open, the bottoms of the tubes are closed, forming a barrier layer structure similar to that of porous alumina. The average tube diameter, ranging in size from 25 to 65 nm, was found to increase with increasing anodizing voltage, while the length of the tube was found independent of anodization time. A possible growth mechanism is pres

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19

Fujimoto, Keiji, Masao Minato, Susumu Miyamoto, et al. "Porous polyurethane tubes as vascular graft." Journal of Applied Biomaterials 4, no. 4 (1993): 347–54. http://dx.doi.org/10.1002/jab.770040409.

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20

Broussous, L., J. C. Ruiz, A. Larbot, and L. Cot. "Stamped ceramic porous tubes for tangential filtration." Separation and Purification Technology 14, no. 1-3 (1998): 53–57. http://dx.doi.org/10.1016/s1383-5866(98)00059-8.

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21

Mitosek, M. "Oscillatory liquid flow in elastic porous tubes." Acta Mechanica 101, no. 1-4 (1993): 139–53. http://dx.doi.org/10.1007/bf01175602.

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22

Nawaukkaratharnant, Nithiwach, Thanakorn Wasanapiarnpong, Charusporn Mongkolkachit, and Thanataon Pornphatdetaudom. "Preparation of Porous Cylindrical Tubes Substrates from Zeolite and Clay for TiO₂ Photocatalyst Coating." Key Engineering Materials 766 (April 2018): 270–75. http://dx.doi.org/10.4028/www.scientific.net/kem.766.270.

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Titanium dioxide (TiO2) is the one of photocatalyst materials that widely used for decolorization of organic compounds in wastewater by photocatalytic mechanism which can be activated by UV light. Unfortunately, in the case of fine TiO2 power, filtration of the powder after water treatment process is difficult. In this research, coating or immobilizing the TiO2 powder on substrates using for removing the color of lignin concentration is interesting. The objectives of this research are to prepare the floating porous cylindrical tube substrates composed of zeolite NaA and ball clay, and then to

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23

Yazaki, T., Y. Tashiro, and T. Biwa. "Measurements of sound propagation in narrow tubes." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 463, no. 2087 (2007): 2855–62. http://dx.doi.org/10.1098/rspa.2007.1897.

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The propagation of sound in hollow tubes is a fundamental theme common to many areas of classical acoustics. Kirchhoff's theory explaining the propagation of sound in a circular tube is now playing an important role as a starting point in studying sound in porous media. This paper reports on measurements of the phase velocity and attenuation coefficient in the narrow regions of tubes, where the sound undergoes anomalous dispersion and is seen to slow down remarkably to the extent that a runner can pass ahead of it. Kirchhoff's theory can be verified by experiment over a wide range of thermodyn

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24

Zhao, Lili, Martin Steinhart, Jian Yu, and Ulrich Gösele. "Lead titanate nano- and microtubes." Journal of Materials Research 21, no. 3 (2006): 685–90. http://dx.doi.org/10.1557/jmr.2006.0078.

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Lead titanate (PbTiO3) nano- and microtubes were fabricated by wetting ordered porous alumina and macroporous silicon with precursor oligomers coupled with templated thermolysis. The diameters of the PbTiO3 tubes range from a few tens of nanometers up to one micron. The proper selection of the template allowed for a precise adjustment of their size over two orders of magnitude. Electron microscopy and x-ray diffraction revealed that the tube walls were polycrystalline. The generic approach presented here can be adapted for the fabrication of tubes and rods from a multitude of functional inorga

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25

Liu, Huiqiao, Lifang Jiao, Yanping Zhao, et al. "Improved dehydrogenation performance of LiBH4 by confinement into porous TiO2 micro-tubes." J. Mater. Chem. A 2, no. 24 (2014): 9244–50. http://dx.doi.org/10.1039/c4ta01327a.

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Porous TiO<sub>2</sub> micro-tubes were fabricated by a solvothermal method, and the effect of TiO<sub>2</sub> micro-tubes on the hydrogen desorption properties of LiBH<sub>4</sub> was systematically investigated.

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26

Rossen, William R. "Snap-off in constricted tubes and porous media." Colloids and Surfaces A: Physicochemical and Engineering Aspects 166, no. 1-3 (2000): 101–7. http://dx.doi.org/10.1016/s0927-7757(99)00408-2.

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27

Vorob’eva, A. I., and B. G. Shulitskii. "Aligned carbon tubes synthesized using porous aluminum oxide." Russian Microelectronics 41, no. 5 (2012): 285–92. http://dx.doi.org/10.1134/s1063739712030080.

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28

Xu, Zhimin, Wei He, Fengxian Xin, and Tian Jian Lu. "Sound propagation in porous materials containing rough tubes." Physics of Fluids 32, no. 9 (2020): 093604. http://dx.doi.org/10.1063/5.0017710.

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29

Mishra, Satyabrata, C. Mallika, P. K. Das, U. Kamachi Mudali, and R. Natarajan. "Development and Characterization of Porous Silicon Nitride Tubes." Transactions of the Indian Ceramic Society 72, no. 1 (2013): 52–55. http://dx.doi.org/10.1080/0371750x.2013.794034.

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30

Islam, M. A., S. Malamusis, and I. Mladenov. "On the deformational characteristics of porous polymeric tubes." Journal of Applied Polymer Science 44, no. 11 (1992): 1899–903. http://dx.doi.org/10.1002/app.1992.070441104.

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31

Dahl, Jaimee K., Alan W. Weimer, Andreas Z’Graggen, and Aldo Steinfeld. "Two-Dimensional Axi-Symmetric Model of a Solar-Thermal Fluid-Wall Aerosol Flow Reactor." Journal of Solar Energy Engineering 127, no. 1 (2005): 76–85. http://dx.doi.org/10.1115/1.1824108.

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A solar-thermal fluid-wall reactor consisting of three concentric vertical tubes is constructed to dissociate methane to hydrogen and carbon black using concentrated solar power. Several aspects of the design are modeled for scaling the system up: the heat transfer and its effect on the integrity of the materials, and the fluid flow of all gas streams within the reactor. It is determined that the inlet gas temperatures, mass flow rates, and permeability of the porous wall affect the gas flow profile through the porous tube wall. By increasing the inlet gas temperature and/or the tube permeabil

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32

Tibbitts, T. W., and W. Cao. "246 DEVELOPMENT OF A NEGATIVE WATER PRESSURE SYSTEM AND USE FOR CONTROLLING ASSIMILATE PARTITIONING IN POTATOES." HortScience 29, no. 5 (1994): 464g—465. http://dx.doi.org/10.21273/hortsci.29.5.464g.

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A nutrient delivery system developed for plant growth in space provides a unique system for maintaining a constant, slightly-negative water tension for plant research. The system involves the use of multiple porous stainless steel tubes positioned 4 cm apart in shallow trays (44 cm long, 32 cm wide and 8 cm deep), and then covered with a 4 cm layer of fine medium. Nutrient solution is recirculated through the porous tubes under -5 cm (water head) of negative pressure maintained with a siphoning procedure. Potatoes grown with negative pressures were compared to growth in similarly constructed t

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33

MIKELIĆ, ANDRO, and MARIO PRIMICERIO. "MODELING AND HOMOGENIZING A PROBLEM OF ABSORPTION/DESORPTION IN POROUS MEDIA." Mathematical Models and Methods in Applied Sciences 16, no. 11 (2006): 1751–81. http://dx.doi.org/10.1142/s0218202506001704.

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We consider a convection–diffusion problem in a porous medium saturated by a solution of a chemical substance A in water. A nonlinear non-equilibrium kinetics of absorption/desorption of A on the porous matrix is assumed. We assume that the chemical substance can be transported by ionic exchange through the walls of an array of parallel tubes in which the solution flows at a prescribed velocity. The well-posedness of the problem is proved under different boundary conditions. If the array of tubes is periodic, we homogenize the problem and prove that there exists a unique solution to the homoge

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34

Cao, Weixing, and Theodore W. Tibbitts. "Using a Porous-tube System to Study Potato Responses to Constant Water Tension in a Rooting Matrix." Journal of the American Society for Horticultural Science 121, no. 3 (1996): 399–403. http://dx.doi.org/10.21273/jashs.121.3.399.

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A system maintaining continuous water tension on a nutrient solution has been developed to control root zone moisture levels for plants in microgravity conditions. This study was conducted in a growth chamber to characterize potato (Solanum tuberosum L.) responses to constant water tension compared to plants grown with no tension using a free-water technique. In three separate experiments, plants were grown in trays filled with a 4-cm layer of 1-mm-diameter isolite (porous ceramic) particles. Ten porous stainless-steel tubes, 4 cm apart, were buried in the medium, and nutrient solution was dra

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35

Ao, Q., A. J. Wang, W. L. Cao, et al. "Preparation of Porous Multi-Channeled Chitosan Conduits for Nerve Tissue Engineering." Key Engineering Materials 288-289 (June 2005): 27–30. http://dx.doi.org/10.4028/www.scientific.net/kem.288-289.27.

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A new method to fabricate porous chitosan nerve conduits with multi-channels was described. A uniquely designed mold was composed of 7-50 stainless steel needles and a set of plastic pedestals. Porous or imperforate chitosan tubes with 2-5mm inner diameter and 0.2-1.0 mm wall thickness were made firstly. The chitosan tubes were injected with 3% chitosan gel. The stainless steel needles longitudinally perforated through the chitosan tubes filled with chitosan gel, and the plastic pedestals were used to fix the needles. Lyophilization was used to finish fabrication. The diameter of channels was

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Raju, K. Sumithra, and Arunn Narasimhan. "Porous Medium Interconnector Effects on the Thermohydraulics of Near-Compact Heat Exchangers Treated as Porous Media." Journal of Heat Transfer 129, no. 3 (2006): 273–81. http://dx.doi.org/10.1115/1.2427074.

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A novel approach of treating near-compact heat exchangers (NCHX) (surface to volume ratio, α=100-300m2∕m3 with hydraulic diameter DM∼6mm) as a “global” porous media, whose thermohydraulic performance is being influenced by the presence of “local” tube-to-tube porous medium interconnectors, connecting the in-line arrangement of tubes (D=2mm) having square pitch of XT=XL=2.25, is investigated in this study using numerical methods. The thermohydraulics of the global porous media (NCHX) are characterized by studying the effect of transverse thickness (δ) and permeability (represented by Dai) of th

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Brown, N. M., and F. C. Lai. "Measurement of Permeability and Slip Coefficient of Porous Tubes." Journal of Fluids Engineering 128, no. 5 (2006): 987–92. http://dx.doi.org/10.1115/1.2234783.

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Experiments have been conducted to measure the permeability and slip coefficient of seven porous tubes. They were made from fiberglass and nylon nettings with various wall thicknesses. Tests show that these tubes have a distinct permeability in the longitudinal and radial directions. In addition, the slip coefficient which is important in many applications was determined. From the results obtained, one can conclude that both permeabilities depend on the material, but the radial permeability also depends on the wall thickness. The slip coefficient depends not only on the material but also on th

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Kumar, Abhishek, Kuo-Shu Hung, and Chi-Chuan Wang. "Nucleate Pool Boiling Heat Transfer from High-Flux Tube with Dielectric Fluid HFE-7200." Energies 13, no. 9 (2020): 2313. http://dx.doi.org/10.3390/en13092313.

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In the present experimental study, nucleate pool boiling heat transfer measurements of two high-flux tubes (sample A and sample B) were conducted at atmospheric pressure with HFE-7200 as the working fluid. Both high-flux tubes were made from a sintered Cu-Ni (high-flux) alloy powder. The porous high-flux surface was coated inside the test tube and it is tested within the heat flux ranging from 2.6 to 86 kW/m2. The major difference between sample A and sample B was the coating thickness, where sample B (0.6 mm) was much larger than that of sample A (0.07 mm). Both tubes showed about three times

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Nallapu, Santhosh, and G. Radhakrishnamacharya. "Jeffrey Fluid Flow through Porous Medium in the Presence of Magnetic Field in Narrow Tubes." International Journal of Engineering Mathematics 2014 (June 25, 2014): 1–8. http://dx.doi.org/10.1155/2014/713831.

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Jeffrey fluid flow in the presence of magnetic field through porous medium in tubes of small diameters is studied. It is assumed that the core region consists of a Jeffrey fluid and the peripheral region of a Newtonian fluid. Making the assumptions as in the work of Chaturani and Upadhya, the linearised equations of motion have been solved and analytical solution has been obtained. The influence of various pertinent parameters on the flow characteristics such as effective viscosity, core hematocrit, and mean hematocrit has been studied and discussed through graphs. It is found that the effecti

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40

Schnitzlein, K. "A Note on Laminar Flow in Uniformly Porous Tubes." Journal of Fluids Engineering 115, no. 3 (1993): 493–96. http://dx.doi.org/10.1115/1.2910165.

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A numerical analysis of the steady, laminar, incompressible flow in a constant diameter tube with uniform mass suction at the wall is made to study the development of the flow for the entire range of wall Reynolds numbers. It is shown that for small suction rates the state of flow can reach the similarity condition at least at distinct positions at the tube axis. For higher suction rates similarity profiles are found to occur only if the flow exhibits an asymmetric behavior with respect to the point of complete mass extraction.

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Liang, Zhijian, and Andrei S. Susha. "Mesostructured Silica Tubes and Rods by Templating Porous Membranes." Chemistry - A European Journal 10, no. 19 (2004): 4910–14. http://dx.doi.org/10.1002/chem.200400005.

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42

Sözen, Mehmet, and T. M. Kuzay. "Enhanced heat transfer in round tubes with porous inserts." International Journal of Heat and Fluid Flow 17, no. 2 (1996): 124–29. http://dx.doi.org/10.1016/0142-727x(95)00095-8.

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Vitorino, N., C. Freitas, M. J. Ribeiro, J. C. C. Abrantes, and J. R. Frade. "Porous hollow tubes processed by extrusion of ceramic emulsions." Applied Clay Science 105-106 (March 2015): 60–65. http://dx.doi.org/10.1016/j.clay.2014.12.014.

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Janoske, U. "Vortex shedding frequency of porous circular tubes with varying porous properties along the circumference." International Journal of Computational Methods and Experimental Measurements 4, no. 4 (2016): 464–73. http://dx.doi.org/10.2495/cmem-v4-n4-464-473.

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Sun, Lan, Qi Chen, and Sherry Laroche. "CONVECTIVE MASS TRANSFER THROUGH AN UNREACTIVE POROUS DEPOSIT LAYER UNDER HIGH TEMPERATURE CONDITIONS." CNL Nuclear Review 8, no. 1 (2019): 71–82. http://dx.doi.org/10.12943/cnr.2017.00018.

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Fe–Cr–Ni alloys have experienced localized degradation, such as stress-corrosion cracking (SCC), when used for steam generator tubes in nuclear power plants. The tube surface can be covered by a porous deposit layer resulting primarily from fouling. This porous layer acts as a barrier to the mass transfer for the chemical species in the main fluid to the tube surface. Thus, it influences the interfacial chemistry at the metal surface and the susceptibility of Fe–Cr–Ni alloys to SCC. While the chemistry of the main fluid can be controlled and monitored, this interfacial chemistry must be determ

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Deng, Ding-Rong, Tai-Hua An, Yi-Juan Li, Qi-Hui Wu, Ming-Sen Zheng, and Quan-Feng Dong. "Hollow porous titanium nitride tubes as a cathode electrode for extremely stable Li–S batteries." Journal of Materials Chemistry A 4, no. 41 (2016): 16184–90. http://dx.doi.org/10.1039/c6ta07221f.

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Porous titanium nitride (TiN) tubes which have a high conductivity are used as the sulfur host material. The TiN tubes have a strong affinity for sulfur atoms/ions in LiPSs, and can catalyze the oxidation of LiPSs. The TiN/S cathode presented a high specific capacity, excellent cycling performance and high coulombic efficiency.

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Manga, Michael. "Dynamics of drops in branched tubes." Journal of Fluid Mechanics 315 (May 25, 1996): 105–17. http://dx.doi.org/10.1017/s0022112096002352.

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The flow of two-dimensional deformable drops through branching (bifurcating) tubes is studied numerically using a boundary integral formulation. The undeformed drop diameter is assumed to be less than the tube diameter. Capillary numbers between 10−2 and 1 are considered. Flow in the branching tube is characterized by the fraction of fluid which enters each of the two downstream branches. The likelihood of drops entering the high-flow-rate branch increases as (i) the viscosity ratio between the drops and suspending fluid decreases, (ii) the capillary number increases, and (iii) the drop size i

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Kim, Sung Jin, Jae Wook Yoo, and Seok Pil Jang. "Thermal Optimization of a Circular-Sectored Finned Tube Using a Porous Medium Approach." Journal of Heat Transfer 124, no. 6 (2002): 1026–33. http://dx.doi.org/10.1115/1.1495517.

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The present work investigates the heat transfer characteristics of a laminar fully developed forced convection in a circular-sectored finned tube with axially uniform heat flux and peripherally uniform wall temperature. The tubes with circular-sectored fins are modeled as a fluid-saturated porous medium. Using the Brinkman-extended Darcy model for fluid flow and the two-equation model for heat transfer, the analytical solutions for both velocity and temperature distributions are obtained and compared with the exact solution for fluid flow and the numerical solutions for conjugate heat transfer

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Sun, Dongya, Liwen He, Rongqiang Chen, et al. "The synthesis, characterization and electrochemical performance of hollow sandwich microtubules composed of ultrathin Co3O4 nanosheets and porous carbon using a bio-template." Journal of Materials Chemistry A 6, no. 39 (2018): 18987–93. http://dx.doi.org/10.1039/c8ta07711h.

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Böttger-Hiller, Falko, Patrick Kempe, Gisela Baumann, et al. "The Controlled Synthesis of Carbon Tubes and Rods by Template-Assisted Twin Polymerization." Advances in Materials Science and Engineering 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/872019.

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The application of porous carbon is versatile. It is used for high-performance catalyst support, electrode material in batteries, and gas storage. In each of these application fields nanostructuring improves the material properties. Supercapacitors store a high energy density. Exactly adapted carbon structures increase the life of lithium batteries and protect catalysts with increasing reaction rate and selectivity. Most of porous carbon materials have a spherical shape. To the best of our knowledge, there is no procedure to synthesize nanostructured cylindrical porous carbon systematically. H

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