Evaluation of Surrogate Models for Shape Optimization of Compressor Blades

Abdus Samad,Kwang-Yong Kim 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-

Performances of multiple surrogate models are evaluated in a turbomachinery blade shape optimization. The basic models, i.e., Response Surface Approximation, Kriging and Radial Basis Neural Network models as well as weighted average models are tested for shape optimization. Global data based errors for each surrogates are used to calculate the weights. These weights are multiplied with the respective surrogates to get the final weighted average models. The design points are selected using three level fractional factorial D-optimal designs. The present approach can help address the multi-objective design on a rational basis with quantifiable cost-benefit analysis.

Multi-Objective Shape Optimization of an Axial Fan Blade

Abdus Samad,Ki-Sang Lee,Kwang-Yong Kim 대한설비공학회 2008 International Journal of Air-Conditioning and Refr Vol.16 No.1

축류압축기 블레이드의 표면조도가 성능에 미치는 영향

Abdus Samad,김광용 한국유체기계학회 2007 한국유체기계학회 논문집 Vol.10 No.3

Numerical Analysis of Centrifugal Impeller for Different Viscous Liquids

Abdus Samad,Sayed Ahmed Imran Bellary 한국유체기계학회 2015 International journal of fluid machinery and syste Vol.8 No.1

Oil and gas industry pumps viscous fluids and investigation of flow physics is important to understand the machine behavior to deliver such fluids. 3D numerical flow simulation and analysis for different viscous fluids at different rotational speeds of a centrifugal impeller have been reported in this paper. Reynolds-averaged Navier Stokes (RANS) equations were solved and the performance analysis was made. Standard two equation k-ε model was used for the turbulence closure of steady incompressible flow. An inlet recirculation and reverse flow in impeller passage was observed at low impeller speeds. It was also found that the higher viscosity fluids have higher recirculation which hinders the impeller performance.

Flow Analyses Inside Jet Pumps Used for Oil Wells

Abdus Samad,Mohammad Nizamuddin 한국유체기계학회 2013 International journal of fluid machinery and syste Vol.6 No.1

Jet pump is one type of artificial lifts and is used when depth and deviation of producing wells increases and pressure depletion occurs. In the present study, numerical analysis has been carried out to analyze the flow behavior and find the performance of the jet pump. Reynolds-averaged Navier Stokes equations were solved and k-ε turbulence model was used for simulations. Water and light oil as primary fluids were used to pump water, light oil and heavy oil. The ratios of area and length to diameter of the mixing tube were considered as design parameters. The pump efficiency was considered to maximize for the downhole conditions. It was found that the increase in viscosity and density of the secondary fluid reduced efficiency of the system. Water as primary fluid produced better efficiency than the light oil. It was also found that the longer throat length increased efficiency upto 40% if light oil was used as primary fluid and secondary fluid viscosity was 350 cSt.

Equilibrium, kinetic and thermodynamic studies of the adsorption of trypan blue dye by Pseudomonas sp. strain MM02 inactivated biomass

Abubakar Abdussamad,Manogaran Motharasan,Yasid Nur Adeela,Othman Ahmad Razi,Shukor Mohd Yunus Abd 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.8

More concerning about dye pollution is that it is being worsened by a lack of adequate treatment. This study optimized the adsorption of Trypan Blue (TB) dye in an aqueous solution using screened bacterial biomass. Among twelve different bacterial isolates screened against TB dye, Pseudomonas sp. strain MM02 showed a high adsorption percentage of 36.5%. The adsorption process was enhanced using one-factor-at-a-time (OFAT) and response surface methodology (RSM) optimization. An adsorption of 59% was achieved through OFAT optimization (TB dye concentration 15 ppm, contact time 20 min, pH 6.5, agitation speed 150 rpm, adsorbent amount 1.10 g and temperature 30 °C), while statistical optimization using RSM resulted in a further increased adsorption of the dye to 61.51% (TB dye concentration 22.27 ppm, adsorbent size 0.32 g, and temperature 34.27 °C). The results of this investigation demonstrated that OFAT and RSM optimization were effective and that they were also appropriate strategies for optimizing the adsorption of TB dye by Pseudomonas sp. strain MM02. Thus, it is possible to achieve the necessary water quality while saving money by using the strain MM02 of Pseudomonas sp. MM02 in a water treatment facility. Changes in free energy of adsorption (ΔGo), enthalpy (ΔHo) and entropy (ΔSo) as well as the activation energy (Ea) were determined. ΔHo, ΔSo and Ea with pH control were −26.5, −230 and 43.5 kJ/mol. The result showed that bacterial cellulose could be employed as an effective sorbent for the removal of direct dye from an aqueous solution and the values of ΔHo, ΔGo and Ea indicate that the adsorption of direct dye onto bacterial cellulose was a physisorption process: ΔGo and ΔHo.

Epidemiological Investigation and Antibiotic Sensitivity of Salmonellosis in Goats at the Selected Areas of Bangladesh

Saha, Gobindha Kumar,Paul, Ashit Kumar,Abdussamad, Abdussamad,Islam, M. Ariful,Khan, M. Shahidur Rahman The Korean Society of Embryo Transfer 2013 한국동물생명공학회지 Vol.28 No.4

Salmonellosis is one of the life-threating diseases of goat in Bangladesh. Therefore, the present study was designed to study the prevalence of Salmonellosis, and isolation and characterizations of the Salmonella spp. from apparently healthy and diarrheic goat. A total of 47 faces samples were collected from selected place and cultured onto different prescribed medium to isolate it. In this study, 12.76% (6/47) samples were found to be positive for Salmonella spp. During culture on SS agar medium, all of the Salmonella isolates produced round, smooth, opaque, translucent and black color colonies on SS agar media. All of the isolated Salmonella spp. fermented dextrose, maltose and mannitol with production of acid and gas but did not ferment sucrose and lactose. However, these isolates had showed Indole and Voges-Proskauer test negative, Methyl-Red test positive. All of these isolates were subjected to rapid plate agglutination test with polyvalent "O" (Poly 'O') and polyvalent "H" (poly 'H') antisera where positive agglutination were observed. They were highly sensitive to ciprofloxacin, spiramycin and gentamycin; moderately sensitive to oxytetracyline, streptomycin and amoxicillin; less sensitive to sulphamethoxazole and resistant to penicillin-G. Based on the present findings, it may be concluded that the investigated Salmonella spp. from goats might be S. typhimurium, S. enteritidis, S. brandenburg, S. salford, S. newbrunswick, S. newport or S. dublin. Further study will be needed, therefore it requires further characterization using other serological and molecular techniques.

Epidemiological Investigation and Antibiotic Sensitivity of Salmonellosis in Goats at the Selected Areas of Bangladesh

Gobindha Kumar Saha,Ashit Kumar Paul,Abdussamad,M. Ariful Islam,M. Shahidur Rahman Khan 사단법인 한국동물생명공학회 2013 한국동물생명공학회지 Vol.28 No.4

Salmonellosis is one of the life-threating diseases of goat in Bangladesh. Therefore, the present study wasdesigned to study the prevalence of Salmonellosis, and isolation and characterizations of the Salmonella spp. fromapparently healthy and diarrheic goat. A total of 47 faces samples were collected from selected place and culturedonto different prescribed medium to isolate it. In this study, 12.76% (6/47) samples were found to be positive forSalmonella spp. During culture on SS agar medium, all of the Salmonella isolates produced round, smooth, opaque,translucent and black color colonies on SS agar media. All of the isolated Salmonella spp. fermented dextrose,maltose and mannitol with production of acid and gas but did not ferment sucrose and lactose. However, theseisolates had showed Indole and Voges-Proskauer test negative, Methyl-Red test positive. All of these isolates weresubjected to rapid plate agglutination test with polyvalent “O” (Poly ‘O’) and polyvalent “H” (poly ‘H’) antiserawhere positive agglutination were observed. They were highly sensitive to ciprofloxacin, spiramycin and gentamycin;moderately sensitive to oxytetracyline, streptomycin and amoxicillin; less sensitive to sulphamethoxazole and resistantto penicillin-G. Based on the present findings, it may be concluded that the investigated Salmonella spp. from goatsmight be S. typhimurium, S. enteritidis, S. brandenburg, S. salford, S. newbrunswick, S. newport or S. dublin. Furtherstudy will be needed, therefore it requires further characterization using other serological and molecular techniques.

Enhanced performance of lanthanum orthoferrite/chitosan nanocomposites for adsorptive photocatalytic removal of Reactive Black 5

Muhd Arif Aizat Marhalim,Safia Syazana Mohtar,Abdussamad Mukhtar Mohammed,Farhana Aziz,Mohd Nazri Mohd Sokri,Wan Norharyati Wan Salleh,Norhaniza Yusof,Juhana Jaafar,Ahmad Fauzi Ismail,Madzlan Aziz,Ros 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.8

New lanthanum orthoferrite (LaFeO3)/chitosan nanocomposites were synthesized with different chitosan loadings (15 and 35%). Their adsorptive photocatalytic activity in the removal of Reactive Black 5 (RB5) was studied by manipulating the pH of the RB5 solution (pH 3, pH 6, pH 9), the catalyst loading (1 g L1, 2 g L1, and 3 g L1), and the initial concentration of RB5 (30mg L1, 50mg L1, and 70 mg L1) under 100W LED light. The nanocomposites have a nanocrystalline structure similar to LaFeO3 with a lower SBET and PV but a higher PR. The LaFeO3 was distributed well on chitosan matrices with variations in the elemental composition. The band gap was gradually decreased with increased chitosan loading. The nanocomposite with 15% chitosan loading (LC15) resulted as the most prominent photocatalyst with the highest removal of RB5 up to 98.5% under experimental conditions of pH 6, 2 g L1 of catalyst loading, and 30mg L1 of initial RB5 concentration. The LC15 showed good stability, wherein the degradation efficiency was more than 90% after the fifth cycle with no significant change in the chemical properties. This work provides a technique to improve the removal of recalcitrant dyes through the processing of adsorptive photocatalysis utilizing adsorbent and perovskite.

Epidemiological Investigation and Antibiotic Sensitivity of Salmonellosis Epidemiological Investigation and Antibiotic Sensitivity of Salmonellosis

Gobindha Kumar Saha,Ashit Kumar Paul,Abdussamad,M. Ariful Islam,M. Shahidur Rahman Khan 韓國受精卵移植學會 2013 한국동물생명공학회지 Vol.28 No.4

Salmonellosis is one of the life-threating diseases of goat in Bangladesh. Therefore, the present study was designed to study the prevalence of Salmonellosis, and isolation and characterizations of the Salmonella spp. from apparently healthy and diarrheic goat. A total of 47 faces samples were collected from selected place and cultured onto different prescribed medium to isolate it. In this study, 12.76% (6/47) samples were found to be positive for Salmonella spp. During culture on SS agar medium, all of the Salmonella isolates produced round, smooth, opaque, translucent and black color colonies on SS agar media. All of the isolated Salmonella spp. fermented dextrose, maltose and mannitol with production of acid and gas but did not ferment sucrose and lactose. However, these isolates had showed Indole and Voges-Proskauer test negative, Methyl-Red test positive. All of these isolates were subjected to rapid plate agglutination test with polyvalent “O” (Poly ‘O’) and polyvalent “H” (poly ‘H’) antisera where positive agglutination were observed. They were highly sensitive to ciprofloxacin, spiramycin and gentamycin; moderately sensitive to oxytetracyline, streptomycin and amoxicillin; less sensitive to sulphamethoxazole and resistant to penicillin-G. Based on the present findings, it may be concluded that the investigated Salmonella spp. from goats might be S. typhimurium, S. enteritidis, S. brandenburg, S. salford, S. newbrunswick, S. newport or S. dublin. Further study will be needed, therefore it requires further characterization using other serological and molecular techniques.