CFD INVESTIGATION OF PLATE HEAT EXCHANGER USING NANOFLUIDS

Heat transfer and fluid flow in a single pass counter flow chevron corrugated-plates plate heat exchanger considering nanofluids (SiO2 and CuO) as homogeneous mixtures has been presented in this dissertation using the Commercial CFD software, ANSYS FLUENT. The required thermo physical properties of the nanofluid have been taken from literature and used in CFD Model. Individual optimum concentration of SiO2/water and CuO/water nanofluids yields maximum heat transfer improvement with regards to the temperature, pressure and velocity fields. The results of CFD analysis of CuO and SiO2 were compared with Common fluid Water in order to verify the accuracy of the homogeneous model. Analysis can be performed to predict the plate heat exchanger performance with reasonable accuracy. SiO2/water gives better heat transfer performance compared to CuO/water. CFD Analysis shows that corrugation pattern of the plate develops turbulence and vortices of fluid which results in high heat transfer rates

CFD ANALYSIS OF PERIODIC FLOW HEAT EXCHANGER USING NANOFLUIDS

Many heat transfer applications such as steam generators in a boiler or air cooling coil of an air conditioner, can be modelled in a bank of tubes containing a fluid flowing at one temperature that is immersed in a second fluid in a cross flow at different temperature. CFD analysis is a useful tool for understanding flow and heat transfer principles as well as for modelling these types of geometries. Both the fluids considered in the present study are CuO Nano fluid, and SiO2 and flow is classified as laminar and steady with The tube spacing or arrangement with 30 and 60 degree angle are studied to determine the maximum heat transfer fluid Both the nanofluids are simulated with both the angle arrangement to extract pressure velocity and temperature distribution the analysis is the compared with the common fluid Water to determine the performance of the arrangement

CFD ANALYSIS FOR FLOW AND TEMPERATURE DISTRIBUTION IN SHELL AND TUBE HEAT EXCHANGER WITH BAFFLES

Shell-and-tube heat exchanger is one of the most widely used heat exchange apparatus in various industrial processes and in research fronts. Baffle selection is critical to control and improve the thermo-hydraulic performance of this type of heat exchanger. three-dimensional computational fluid dynamics (CFD) Analysis, using the commercial software, have been performed to study and compare the Temperature, heat transfer coefficient Velocity pressure distribution between the segmental baffles and helical baffles at low shell side flow rates. In this comparison, the whole heat exchangers consisting of the shell, tubes, and baffles are modelled. The model predicts the thermo-hydraulic performance with a considerably good accuracy, by comparing with Segmental baffle and helical baffle with 5 turns and 6 turns. The model is created using the commercial software and the heat transfer analysis is carried out using the fluent therefore the obtained results is then compared using the nanofluid Al2O3 in shell side

Scintillation Counters for the D0 Muon Upgrade

We present the results of an upgrade to the D0 muon system. Scintillating counters have been added to the existing central D0 muon system to provide rejection for cosmic ray muons and out-of-time background, and to provide additional fast timing information for muons in an upgraded Tevatron. Performance and results from the 1994-1996 Tevatron run are presented.Comment: 30 pages, 25 postscript figure

Correlation of compaction characteristics of natural soils with modified plastic limit.

Compaction characteristics of soils being very important from field application point of view, any attempt to develop correlation equation to predict the same should be rational and universally applicable. It has been reported in the literature that the plastic limit of soils bear a good correlation with their compaction characteristics. In this study, attempts have been made to use modified plastic limit to account for the proportion of fraction less than 425 μm as a parameter to correlate with the compaction characteristics of natural soils. The proposed correlation between the compaction characteristics of natural soils with their modified plastic are going to be handy tool for construction engineers in quickly assessing their suitability for compaction related purposes

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Not AvailableMyostatin (MSTN), a transforming growth factors β (TGF-β) family member, is an important regulator of muscle mass. While polymorphism in the coding region of MSTN is extensively studied, the genetic causes of transcriptional regulation are poorly understood. This study is targeted to identify variations in the promoter region of MSTN. This study revealed that the promoter region of the growth differentiation factor 8 (GDF-8) is highly polymorphic and the identified nucleotide variations were attributed to transition mutations in sequence. Out of three genotypes observed, the frequency of AA was significantly higher (0.63) followed by the frequencies of AB (0.28) and BB (0.09). Genotype BB had a significant effect on body weight at hatching implicating the role of the identified single nucleotide polymorphisms (SNPs) in the chicks muscle developmentICAR-DP