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Ahsan, Muhammad
School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Islamabad
Education Engineering

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Computational Fluid Dynamics (CFD) Simulation and Comparison for Different Numbers of Baffles to Reduce Concentration Polarization Effects in Membrane Tubes Ahsan, Muhammad; Hussain, Arshad
Journal of Engineering and Technological Sciences Vol 49, No 1 (2017)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (737.598 KB) | DOI: 10.5614/j.eng.technol.sci.2017.49.1.7

Abstract

This research shows the use of computational fluid dynamics (CFD) with finite volume method (FVM) to study the species diffusion and mixing characteristics in a tubular membrane filled with vertical baffles. This study exhibits how to set up the FVM for CFD simulation and residence time distribution (RTD) analysis and compare the mixing characteristics of two membrane tubes with a different number of baffles using RTD curves. In this study, the effects of the number of baffles on flow patterns, features and behavior of air were identified completely through computational fluid dynamics (CFD) simulations. In addition, a two-dimensional simulation was implemented to study the effects of steady and unsteady (transient) flow in the tubular membrane. The residence time distribution (RTD) of a tracer in a co-current flow pattern was investigated. For this, the tracer was injected for 1 second into the membrane tubes on a frozen flow field and the concentration variation of the tracer over time was monitored at the outlet.
Developing a Management Model of PAI Teachers' Competency Improvement Based on Online Networks Ahsan, Muhammad; Masrukhi, Masrukhi; Haryono, Haryono; Rusdarti, Rusdarti
The Journal of Educational Development Vol 7 No 1 (2019): February 2019
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jed.v7i1.29326

Abstract

This study aimed to describe the factual management model of teacher competency improvement focusing on instructional planning, to describe the design of the management model of teacher competency improvement by utilizing online networks, and to know the validity of the management model. This research implemented a Research and Development (R & D) approach. As the focus of this study, the development of the model is in accordance with the theory of a product-oriented model. The products of this study are in accordance with the characteristics and analysis of the needs of Islamic Religious Education (PAI) teachers. The products are regulated through a needs analysis process that meets the needs of the PAI teachers. The products are lesson plans (RPP) to be shared with colleagues. The results of the needs analysis show the importance of online tools in the improvement of the RPP. The management model of teacher competency improvement utilizes online networks using feasibility analysis, guideline preparation, user manuals, and readability tests that show positive responses from experts and users for the development of this model. The development of this model is seen as valid both from the descriptive aspects of the program and the expert analysis. The design of the teacher competency improvement training is deemed feasible to be developed for the benefit of the PAI teachers.
Co-Authors A.A. Ketut Agung Cahyawan W Haryono Haryono Hussain, Arshad Rusdarti -