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Exact Solutions of Heat Transfer in Boundary Layer Flow over a Permeable Shrinking Sheet in the Presence of Radiation and Heat Source / Sink Scientia Research LibraryJournal of Engineering and Technology Research2348 - 04242025131 Chandaneswar Midya page no:1-10 1 An analytical study is presented to investigate the heat transfer characteristic of boundary layer flow over a linearly shrinking permeable sheet in the presence of radiation and heat source/sink. The governing boundary layer equations are reduced into ordinary differential equations by a similarity transformation. The reduced equations are then solved analytically for power-law surface temperature boundary conditions. The dual temperature is found to exist for any values of heat sink parameter for suction parameter s 2. But in heat source case, the dual temperature may be obtained for s 2 subject to the condition , where is the heat source/sink parameter, Pr the Prandtl number, D the parameter related to radiation and is the real positive root satisfying But for physically valid flow and heat transfer real parameters, it difficult to satisfy the above condition for both the root The effects of radiation parameter, Prandtl number, heat source/sink parameter, the wall mass transfer parameter on the temperature distribution are studied. Keywords: Shrinking sheet, suction, boundary layer flow, Heat transfer, Thermal radiation, heat source/sink, Exact solution. http://www.scientiaresearchlibrary.com/archive-abs.php?arc=901http://www.scientiaresearchlibrary.com/archive/Exact Solutions of Heat Transfer in Boundary Layer Flow over a Permeable Shrinking Sheet in the Presence of Radiation and Heat Source Sink.pdf

Preliminary Assessment of Air and Sound Quality in Ariaria Market, Aba, Southeastern Nigeria Scientia Research LibraryJournal of Engineering and Technology Research2348 - 04242025131 Nwankwoala, H.O[1] and Obioha, S.C[2] page no:11-19 1 This study aims at assessing the air and sound quality of the Ariaria International Market, Aba, in South-Eastern Nigeria. As a first step, the study involved going to the market, studying the layout and mapping out different sections according to type of human activity, vehicular movement and expected type of pollutant. The busiest days of the market were chosen to carry out the field work. Hand-held tools (Cole-Parmer Extec sound level meter, Aerosol Mass Monitor and IBRID MX6 Multi-Gas monitor) were used to measure pre-determined pollutants. Results revealed that SO2 ranged from 0.00 ppm to 0.4ppm which is above the required limits of 0.1ppm and CO went up to about 32ppm, above the required limits of 20ppm. The noise level was up to 94.4 DbA which was above the FEPA standards. Pollution patterns and levels are linked to the type and levels of human activity. It is recommended that an agency be set up to monitor the quality of the environment around areas of dense human activities such as markets and enforce environmentally friendly practices by traders and buyers within the market and surrounding regions. In addition, vehicular traffic be managed efficiently to reduce emissions. Keywords: Air quality, Noise, sound, pollutants, Aba, Nigeria http://www.scientiaresearchlibrary.com/archive-abs.php?arc=904http://www.scientiaresearchlibrary.com/archive/Preliminary Assessment of Air and Sound Quality in Ariaria Market, Aba, Southeastern Nigeria.pdf