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| 1 | Dust dispersion and management in underground mining faces显示文摘Presence of fine dust in air causes serious health hazard for mine operators resulting in such serious problems as coal workers’pneumoconiosis and silicosis.Major sources of dust appear of course along the mining face where the minerals are extracted.Proper control and management are required to ensure safe working environment in the mine.Here,we utilize the computational fluid dynamic(CFD)approach to evaluate various methods used for mitigating dust dispersion from the mining face and for ensuring safe level of dust concentration in the mine tunnel for safety of the operators.The methods used include:application of blowing and exhaust fans,application of brattice and combination of both.The results suggest that among the examined methods,implementation of appropriately located brattice to direct the flow from the main shaft to the mining face is the most effective method to direct dust particles away from the mining face. | Kurnia Jundika Candra Sasmito Agus Pulung Mujumdar Arun Sadashiv | 2014 | International Journal of Mining Science and Technology2014，24，1： | 39 |
| 2 | Prediction of air flow, methane, and coal dust dispersion in a room and pillar mining face显示文摘In underground coal mines, uncontrolled accumulation of methane and fine coal dust often leads to serious incidents such as explosion. Therefore, methane and dust dispersion in underground mines is closely monitored and strictly regulated. Accordingly, significant efforts have been devoted to study methane and dust dispersion in underground mines. In this study, methane emission and dust concentration are numerically investigated using a computational fluid dynamics(CFD) approach. Various possible scenarios of underground mine configurations are evaluated. The results indicate that the presence of continuous miner adversely affects the air flow and leads to increased methane and dust concentrations.Nevertheless, it is found that such negative effect can be minimized or even neutralized by operating the scrubber fan in suction mode. In addition, it was found that the combination of scrubber fan in suction mode and brattice results in the best performance in terms of methane and dust removal from the mining face. | Lu Yueze Akhtar Saad Sasmito Agus P. Kurnia Jundika C. | 2017 | International Journal of Mining Science and Technology2017，27，4： | 10 |
| 3 | Introduction and evaluation of a novel hybrid brattice for improved dust control in underground mining faces: A computational study显示文摘A proper control and management of dust dispersion is essential to ensure safe and productive underground working environment. Brattice installation to direct the flow from main shaft to the mining face was found to be the most effective method to disperse dust particle away from the mining face. However,it limits the movement and disturbs the flexibility of the mining fleets and operators at the tunnel. This study proposes a hybrid brattice system- a combination of a physical brattice together with suitable and flexible directed and located air curtains- to mitigate dust dispersion from the mining face and reduce dust concentration to a safe level for the working operators. A validated three-dimensional computational fluid dynamic model utilizing Eulerian–Lagrangian approach is employed to track the dispersion of dust particle. Several possible hybrid brattice scenarios are evaluated with the objective to improve dust management in underground mine. The results suggest that implementation of hybrid brattice is beneficial for the mining operation: up to three times lower dust concentration is achieved as compared to that of the physical brattice without air curtain. | Kurnia Jundika C. Sasmito Agus P. Hassani Ferri P. Mujumdar Arun S. | 2015 | International Journal of Mining Science and Technology2015，25，4： | 7 |
| 4 | CFD simulation of methane dispersion and innovative methane management in underground mining faces显示文摘 | Kurnia J C Sasmito A P Mujumdar A S | 2014 | Applied mathematical mod- elling2014，38，14： | 1 |
| 5 | Optimization of operating parameters for liquid-cooled PEM fuel cell stacks using Taguchi method显示文摘 | Nita Solehati Joonsoo Bae Agus P. Sasmito | 2011 | Journal of Industrial and Engineering Chemistry2011，，3： | 1 |
| 6 | Some approaches to improve ventilation system in underground coal mines environment-a computational fluid dynamic study 显示文摘 | SASMITO A P BIRGERSSON E LY H C | 2013 | Tunnel Underground Space Technol2013，34，： | 1 |
| 7 | Computational study of forced air-convection in open-cathode polymer dectrolyte fuel cell stacks 显示文摘 | SASMITO A P LUM K W BIRGERSSON E | 2010 | Journal of Power Sources2010，195，： | 1 |
| 8 | Performance evaluation of a polymer electrolyte fuel cell with a dead-end anode: A computational fluid dynamic study显示文摘 | Agus P. Sasmito Arun S. Mujumdar | 2011 | International Journal of Hydrogen Energy2011，，17： | 1 |
| 9 | Passive thermal management for PEM fuel cell stack under cold weather condition using phase change materials (PCM)显示文摘 | Agus P. Sasmito Tariq Shamim Arun S. Mujumdar | 2013 | Applied Thermal Engineering . 2013 (1-2)2013，，1： | 1 |
| 10 | CFD simulation of methane dispersion and innovative methane management in underground mining faces显示文摘 | Jundika C. Kurnia Agus P. Sasmito Arun S. Mujumdar | 2013 | Applied Mathematical Modelling2013，，： | 1 |
| 11 | Performance evaluation of a polymer electrolyte fuel cell with a dead-end anode: a computation- al fluid dynamic study显示文摘 | SASMITO A P MUJUMDAR A S | 2011 | International Journal of Hydrogen Ener- gy2011，36，10： | 1 |
| 12 | PPARγ expression by rambutan peel extract in obesity rat model-induced high-calorie diet显示文摘Objective: To monitor the physiological characteristics and genes expression of obesity rat model after rambutan peel extract(RPE) treatment.Methods: Twenty-four 12-week-old male rats were divided into 4 groups: normal,obesity, obesity treated with ellagic acid(O-EA) and obesity treated with RPE30(ORPE30). Physiological characteristics were monitored by measuring body weight, calorie intake, size of adipocyte and level of triglyceride. Peroxisome proliferator activated receptor gamma(PPARg), CCAAT/enhancer-binding proteins a and fatty acid binding protein 4(FABP4) expression were observed using immunohistochemistry, Western blotting and quantitative RT-PCR methods.Results: Body weight gain of O-EA and O-RPE30 rats were lower than obesity group and size of adipocyte cells were smaller than obesity group(P < 0.05), but when we compared to normal group, those groups had higher body weight gain and larger adipocyte cells. The level of triglycerides, protein expression of PPARg and m RNA level of FABP4 genes were significantly downregulated on O-EA and O-RPE30 compared to obesity group(P < 0.05). Our results indicated that RPE had potential substance as inhibitor of body weight gain, declining of size of adipocyte, level of triglycerides, PPARg expression and m RNA level of FABP4 gene on obesity rat model.Conclusions: RPE have anti-obesity activity by inhibiting body weight gain, declining size of adipocyte, decreasing triglyceride, PPARg expression and m RNA level of FABP4 gene on obesity rat model. | Sri Rahayu Lestari Muhammad Sasmito Djati Achmad Rudijanto Fatchiyah Fatchiyah | 2015 | Asian Pacific Journal of Tropical Biomedicine2015，5，10： | 1 |
| 13 | Numeri- cal investigation of laminar heat transfer performance of various cooling channel designs显示文摘 | Kurnia J. C A.P. Sasmito A.S. Mujumdar | | 0，，： | 1 |
| 14 | Protein Expression of Goat Follicular Fluid (GFF)显示文摘 | Sri Wahjuningsih Mochammad Sasmito Djati | 2012 | Journal of Agricultural Science and Technology(A)2012，2，7： | 0 |
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