TY - JOUR AU - Barua, Saumen AU - Deb, Ujjwal Kumar PY - 2016/11/19 Y2 - 2024/03/28 TI - Hydrodynamics of Microalgae and CO2 flow in a Tubular Photobioreactor and consequent effects on Microalgae growth JF - Rajshahi University Journal of Science and Engineering JA - Rajshahi Univ. j. sci. eng. VL - 44 IS - 0 SE - Articles DO - 10.3329/rujse.v44i0.30390 UR - https://www.banglajol.info/index.php/RUJSE/article/view/30390 SP - 75-83 AB - <p>In biofuel technology from microalgae, the main optimal factors for microalgae cultivations are light, CO<sub>2</sub> and temperature. As microalgae are photosynthetic microorganisms thus they convert sunlight, water and CO<sub>2</sub> to algal biomass. We consider a two phase flow for CO<sub>2</sub> and Microalgae suspension to understand fluid dynamics phenomena after injecting CO<sub>2</sub> gas inside a tubular Photobioreactor (PBR).The growth rate of the microalgae cell is taken as a function of available sun light at Chittagong University of Engineering &amp; Technology (CUET) in our study. A 20.94m long and 0.025m tubular PBR is considered for the simulation. To observe the microalgae cell growth, we selected the 21st June for a bright sunny and the longest day of a year. From the simulation after day seven we observed a very slow growth for the microalgae culture. It is noted that the growth related to concentration of microalgae is increased by day length with respect to continuous sunlight. A small fluctuation of shear rate around Uloop area is also found in our simulation which may be caused to reduce the volumetric production due to cell fragility. From the velocity profile we found that, the velocity is generally higher in the middle of the tube gives a parabolic shape of the suspension flow.</p> ER -