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Articles by K. A. Abbas
Total Records ( 2 ) for K. A. Abbas
  A. S. Mokhtar , K. A. Abbas , M. M. H. Megat Ahmad , S. M. Sapuan , A.O. Ashraf , M.A. Wan and B. Jamilah
  The present work aims at finding an optimized explicit finite difference scheme for the solution of problems involving pure heat transfer from surfaces of Pangasius Sutchi fish samples suddenly exposed to a cooling environment. Regular shaped packages in the form of infinite slab were considered and a generalized mathematical model was written in dimensionless form. An accurate sample of data set was chosen from the experimental work and was used to seek an optimized scheme of solutions. A fully explicit finite difference scheme has been thoroughly studied from the viewpoint of stability, the required time for execution and precision. The characteristic dimension (half thickness) was divided into a number of divisions; n = 5, 10, 20, 50 and 100 respectively. All the possible options of dimensionless time (the Fourier number) increments were taken one by one to give the best convergence and truncation error criteria. The simplest explicit finite difference scheme with n = (10) and stability factor ( (δX )2 /δτ = 2) was found to be reliable and accurate for prediction purposes.
  Marjan Javanmard , Johari Endan , K. A. Abbas and Farshad Arvin
  Problem statement: This study presented a semi-industrial fruit dryer machine which is useful to dry different types of fruit. The drying process and its functions are selectable by user to obtain a multi dryer system. Approach: A microcontroller base controller that enables to simultaneous monitoring was utilized. There are two types of sensors as the inputs of system which are temperature and humidity. The output of sensors continuously was monitored with the main processor and given functions based on fruit types are executed. The selected fruits were put on trays in batch dryer. Results: Presented system was tested on three different fruits which have differences in texture and moisture content. The optimum drying temperature where provided because the product would be dried without burning. The material moisture content decreased throughout the drying process. A cause study was done to illustrate the effectiveness of the designed dryer. Conclusion: Several performed results illustrated the amenability of proposed system as the multi-fruit dryer machine.
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