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Search Results: 1 - 10 of 461316 matches for " A. and Manivannan "
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Computational fluid dynamics analysis of a mixed flow pump impeller
A Manivannan
International Journal of Engineering, Science and Technology , 2010,
Abstract: To improve the efficiency of mixed flow pump, Computational Fluid Dynamics (CFD) analysis is one of the advanced tools used in the pump industry. A detailed CFD analysis was done to predict the flow pattern inside the impeller which is an active pump component. From the results of CFD analysis, the velocity and pressure in the outlet of the impeller is predicted. CFD analyses are done using Star CCM+ software. These outlet flow conditions are used to calculate the efficiency of the impeller. The calculated value of efficiency from the empirical relations is 55%. The optimum inlet and outlet vane angles are calculated for the existing impeller by using the empirical relations. The CAD models of the mixed flow impeller with optimum inlet and outlet angles are modeled using CAD modelling software ProE WF3. To find the relationship between the vane angles and the impeller performance the optimum vane angle is achieved step by step. Three CAD models are modeled with the vane angles between existing and optimum values. These models are analyzed individually to find the performance of the impeller. In the first case, outlet angle is increased by 5°. From the outlet flow conditions, obtained from the CFD analysis, it is evident that the reduced outlet recirculation and flow separation cause the improved efficiency. By changing the outlet angle the efficiency of the impeller is improved to 59%. In the second case inlet angle is decreased by 10%. The efficiency of the impeller in this case is 61%. From this analysis it is understood that the changes in the inlet vane angle did not change the efficiency of the impeller as much as the changes in outlet angle. In the third case, impeller with optimum vane angles is analyzed and the outlet flow conditions are predicted. From the CFD analysis the efficiency of the impeller with optimum vane angles is calculated as 65%. Thus, efficiency of the mixed flow impeller is improved by 18.18% by changing the inlet and outlet vane angles. International Journal of Engineering, Science and Technology, Vol. 2, No. 6, 2010, pp. 200-206
Genotype x Environment interaction for kernel yield in groundnut (Arachis hypogaea L.)
A. Mothilal, P. Vindhiya varman and N. Manivannan
Electronic Journal of Plant Breeding , 2010,
Abstract: Sixteen medium duration groundnut cultures were evaluated for kernel yield, stability and adaptation across fourenvironments. The G X E interaction was highly significant and both linear and non-linear component are equally importantfor yield stability. The genotype ICGV 92004 was classified as highly stable genotype over four environments because of itshigh mean kernel yield, with a regression coefficient close to unity and non-significant deviation from linearity
Stability analysis of foliar disease resistant groundnut genotypes (Arachis hypogaea L.)
A. Mothilal. P. VindhiyaVarman and N. Manivannan
Electronic Journal of Plant Breeding , 2010,
Abstract: Fifteen foliar disease resistant groundnut genotypes and one local variety (VRI 4) were evaluated over four seasons in asingle location to identify the stable high yielding genotypes. Significant G X E interaction showed the differentialperformance of genotypes over different environments / seasons. Stability analysis revealed that only one genotype(ICGV 92093) had near unity regression coefficient coupled with non-significant deviation from regression and highmean kernel yield. Hence, the genotype may be recommended over wide range of environments / seasons.
Phenotypic stability for kernel yield in groundnut (Arachis hypogaea L.)
A. Mothilal, P. Vindhiya varman and N. Manivannan
Electronic Journal of Plant Breeding , 2010,
Abstract: The yield stability of 16 Spanish bunch groundnut genotypes were evaluated in four seasons consecutively forkernel yield per hectare. Two genotypes viz., ICGV 92206 and ICGV 93392 were found to be stable for kernelyield as they possessed non-significant deviation from the regression with regression coefficient nearing unity.
Genetic variability in sesame (Sesamum indicum L.)
Revathi, S., John Joel, A. and Manivannan, N
Electronic Journal of Plant Breeding , 2012,
Abstract: Genetic parameters of variability and heritability of different characters were studied in four crosses of sesame. In the presentstudy, variability parameters were observed in two crosses viz., Paiyur 1 x SVPR 1, F2 of TMV 4 x SVPR 1 and their BC1F1s.High genotypic coefficient of variability and phenotypic coefficient of variability were observed for number ofbranches per plant, number of capsules per plant and seed yield per plant. High heritability along with high geneticadvance as per cent of mean for number of branches per plant, number of capsules per plant and seed yield per plantwill be useful for further breeding programme. Based on per se performance, heritability, genetic advance as per cent ofmean, F2 and BC1F1 of TMV 4 x SVPR 1 were considered as superior crosses. This cross can be subjected to selectionprogramme to obtain high yielding segregants.
Becker′s Muscular Dystrophy-A Case Report
Rajendran P,Manivannan R,Rajarathinam A,Aleem M.A
Annals of Indian Academy of Neurology , 1998,
Abstract: A case of Becker′s Muscular dystrophy (BMD) in a 26-year-old male is reported. Muscle biopsy immunohistochemical staining showed absence of labelling for dystrophin along the sacrolemmal membrane in majority of the fibres. Antibodies to adhalin and merosin showed normal localisation along the sacrolemma.
7,9-Dimethyl-5-phenylsulfonyl-5H-benzo[b]carbazole
G. Chakkaravarthi,V. Dhayalan,A. K. Mohanakrishnan,V. Manivannan
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808024380
Abstract: In the title compound, C24H19NO2S, the mean plane of the benzo[b]carbazole ring system makes a dihedral angle of 79.26 (5)° with the phenyl ring. The S atom is in a distorted tetrahedral configuration. The crystal structure exhibits weak C—H...O and C—H...π interactions.
3-Acetyl-4-hydroxyphenyl acrylate. Corrigendum
G. Chakkaravarthi,A. Anthonysamy,S. Balasubramanian,V. Manivannan
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808034946
Abstract: The chemical name in the title of the paper by Chakkaravarthi, Anthonysamy, Balasubramanian & Manivannan [Acta Cryst. (2007), E63, o4725] is corrected.
9-Methoxy-5-phenylsulfonyl-5H-benzo[b]carbazole
G. Chakkaravarthi,V. Dhayalan,A. K. Mohanakrishnan,V. Manivannan
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808024756
Abstract: In the title compound, C23H17NO3S, the mean plane of the benzo[b]carbazole ring system makes a dihedral angle of 77.17 (4)° with the phenyl ring. The S atom is in a distorted tetrahedral configuration. There are three intramolecular C—H...O interactions forming five- and six-membered rings with graph-set motifs S(5) and S(6), respectively.
(2-Methyl-1-phenylsulfonyl-1H-indol-3-yl)methanol
G. Chakkaravarthi,V. Dhayalan,A. K. Mohanakrishnan,V. Manivannan
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808003024
Abstract: In the title compound, C16H15NO3S, the plane of the phenyl ring forms a dihedral angle of 80.37 (8)° with the indole ring system. The crystal packing is stabilized by weak O—H...O hydrogen bonds which link the molecules into infinite chains along the a axis of the crystal.
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