A HEAT-TRANSFER CORRELATION FOR LIQUID-SOLID FLOWS IN HORIZONTAL PIPES

1994-08-01
OZBELGE, TA
SOMER, TG
Heat transfer from a solid surface to a fluid-solid suspension in vertical or horizontal transport is of importance in the design of heat-exchangers, driers, fluidized beds, and slurry pipeline reactors. There are fewer studies on heat transfer in liquid-solid flows than on gas-solid flows. In this paper, a correlation for heat transfer to dilute liquid-solid flows in a horizontal pipe is presented. Suspension properties were used to derive the following equation: Nu(s) = 0.202Res0.6Prs0.675(D/d(p))0.092(mu(s)/mu(w))-1.95 This correlation can be used to estimate the heat transfer coefficients of liquid-solid two-phase flows for the following ranges of variables: Reynolds number Re(s), 27 000-120 000; Prandtl number Pr(s), 2.1-3.4; the ratio of suspension viscosity to the viscosity of water at the wall temperature mu(s)/mu(w), 1.17-1.83; the ratio of pipe diameter to the particle diameter D/d(p), 182-512; volume fraction of solids in the feed slurry C(f), 0.005-0.03. The accuracy of the correlation is approximately +/-20%.
CHEMICAL ENGINEERING JOURNAL AND THE BIOCHEMICAL ENGINEERING JOURNAL

Suggestions

A NEW CORRELATION FOR TWO-PHASE PRESSURE DROPS IN FULLY DEVELOPED DILUTE SLURRY UP-FLOWS THROUGH AN ANNULUS
Oezbelge, Tuelay A.; Camciuenal, Guelden (Informa UK Limited, 2009-01-01)
The prediction of two-phase pressure drops is important in the design of fluidized beds, heat exchangers, slurry transport lines, annular risers in reactors, driers, and other applications of particulate flows. Experimental data for liquid-solid up-flows through annuli are very limited. In this study, a correlation was developed for predicting two-phase pressure drops via Euler number (Eutp) for liquid-solid suspension up-flows in the fully developed flow region of an annulus in terms of mixture Reynolds nu...
Efficient energy transfer in cofacial boradiazaindacene (BODIPY) dyes built on a xanthane scaffold as a model for early steps in photosynthesis
Dinç, Tarık; Akkaya, Engin Umut; Department of Biochemistry (2006)
Energy transfer is a natural phenomena that bases of the photosynthesis. In photosynthesis, chlorophyls and auxlary absorbing dyes units absorb solar energy and transfer the energy to the reaction center where other chemical reactions occur. Studies showed that energy transfer depends strongly on distance and rigidy of the structure. Rigid structures that close in space transfer energy nearly %100 efficiency. Supramolecular chemistry tries to mimic nature and miniurize natural phenomence on to molecular sca...
Determination of trace elements in marine plankton by inductively coupled plasma mass spectrometry (ICP-MS)
Arslan, Z; Ertas, N; Tyson, JF; Uden, PC; Denoyer, ER (Springer Science and Business Media LLC, 2000-02-01)
A method has been developed for the determination of 23 elements in marine plankton in which inductively coupled plasma (ICP) source mass spectrometry (MS) was used to quantify the elements in the solution after digestion in a mixture of hydrofluoric and nitric acids in sealed PTFE vessels in a microwave field. The procedure was validated by the analysis of a standard reference soil (SRM 2709 San Joaquin Soil) and a standard reference fresh water plankton (CRM 414). The method was applied to the analysis of...
A correlation for natural convection heat transfer from inclined plate-finned heat sinks
MEHRTASH, Mehdi; Tarı, İlker (2013-03-01)
Steady-state natural convection heat transfer from inclined plate-finned heat sinks to air is numerically investigated by using an experimentally validated model. The heat sinks with parallel arrangement of uniform rectangular cross section plate fins are inclined from the vertical in both forward and backward directions in order to investigate the effect of inclination on convection. Our previously validated numerical model for vertically oriented heat sinks is directly used without changing any model para...
A proxy model for determining reservoir pressure and temperature for geothermal wells
Aydin, Hakki; Akın, Serhat; Senturk, Erdinc (Elsevier BV, 2020-11-01)
Estimating reservoir pressure and temperature is one of the challenges of geothermal reservoir engineering. A new proxy model has been developed to estimate reservoir pressure and temperature using wellhead pressure, temperature and non-condensable gas (NCG) amount. An exhaustive set of wellhead data covering a range of possible wellhead pressure, temperature and NCG data is used in a calibrated wellbore simulator, which is then used to create a knowledgebase to train an artificial neural network (ANN) mode...
Citation Formats
T. OZBELGE and T. SOMER, “A HEAT-TRANSFER CORRELATION FOR LIQUID-SOLID FLOWS IN HORIZONTAL PIPES,” CHEMICAL ENGINEERING JOURNAL AND THE BIOCHEMICAL ENGINEERING JOURNAL, pp. 39–44, 1994, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65414.