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Articles by S. Sohrabi
Total Records ( 2 ) for S. Sohrabi
  M.H. Djavareshkian , F. Talati , A. Ghasemi and S. Sohrabi
  In this research, combustion process in the combustion chamber of a DI diesel engine is simulated. Afterwards, results obtained from the multidimensional simulation of the combustion process are used in analytical solution of the heat conduction in cylinder wall. An eddy break-up combustion model and a diesel auto-ignition model were implemented to simulate the ignition and combustion process. All the simulations were carried out by the use of FIRE CFD tool. Numerical results were validated via experimental data for OM_355 DI diesel engine for mean cylinder pressure. The results show that there have been good agreements between experimental data and the CFD calculations. The research demonstrated that the combination of multidimensional CFD simulation and analytical methods is useful for diesel engine wall heat transfer modeling. Effect of cylinder wall material, insulation material and thickness were studied in order to obtain lower heat rejection from the combustion chamber. Using cast iron instead of alluminium for cylinder material, using insulation and increasing the insulation thickness resulted in lower outer wall temperature and heat flux.
  H. Charati , A.K. Esmailizadeh , R. Jabbari Ori , H. Moradiyan and S. Sohrabi
  Quantitative Trait Loci (QTL) are DNA segments linked to traits. In this study, a three-generation resource population was developed using two distinct Japanese quail strains, wild and white to map QTL underlying skeletal architecture. Eight pairs of white and wild birds were crossed reciprocally and 34 F1 birds were produced. The F1 birds were intercrossed to generate 422 F2 off spring. All of the animals from three generations (472 birds) were genotyped for eight microsatellite markers on chromosome 1. The phenotypic data were collected on the F2 birds. QTL analysis was conducted applying the line-cross model and the least-squares interval mapping approach. The results indicated QTL affecting skeletal architecture traits on chromosome 1. The F2 phenotypic variance explained by the detected additive QTL effects ranged from 0.0-2.23 for different traits. The identified QTL interacted significantly with sex (QTL for tibia bone weight, humerus bone length, femur bone diameter, right leg weight) and hatch (QTL for left leg length, breast bone weight, femur weight, femur bone weight, femur meet weight).
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