In order to understand the effect of porous media on hydraulic jumps, a smoothed particle hydrody... more In order to understand the effect of porous media on hydraulic jumps, a smoothed particle hydrodynamics (SPH) model is applied to investigate the characteristics of hydraulic jumps interacting with porous media. Various porosities including cases without an obstacle or with a solid obstacle or porous media are considered. The opening of a gate was altered to adjust the hydraulic jump. The conjugate depth ratio, bottom shear stress distribution, and energy dissipation are reported. In the present study, validations are in a good agreement with previous studies. Overall, the result showed that the average error between numerical and experimental data was less than 7.2%. Energy dissipation is compared among cases with three porosities, with and without a solid obstacle. The porosity of 0.68 is found to dissipate more energy than do other porosities. Thus, porous media can be used to enhance energy dissipation of hydraulic jumps in an open channel. In conclusion, the proposed SPH model can simulate the effect of porous media on hydraulic jump characteristics.
American Journal of Information Science and Computer Engineering , 2015
Developments in science and technology had prompted us to conduct various experiments to create a... more Developments in science and technology had prompted us to conduct various experiments to create a variety of things, which aims to facilitate and provide benefits for humans and beneficial to the continuation of the next study. Fluid flow across a lid-driven cavity was one of the important phenomena in the fields of engineering, especially fluid mechanics. Some real case such as the air flow in a room was an example of the occurrence of this flow. The method used was numerical simulations using OpenFOAM software to determine the value of the observation of the pressure distribution on the outer and inner wall (2D). Variations of Reynolds numbers used were 40, 100 and 1000. For the kinds of case's lid-driven cavity was used to provide information about the flow phenomena. Further analysis and comparison of the results of the data obtained in order to obtain lid-driven cavity flow phenomena with the potential of increasing the engine work well. From the simulation data obtained that in the case of lid-driven cavity for Reynolds numbers 40 obtained a value of 1.4079 Pa pressure distribution, which causes the formation of eddy (vortex). At Reynold's number of 100 obtained values of 0.738674 Pa pressure distribution which causes the formation of such eddy Reynold's number 40. While at Reynolds numbers 1000 led to declining value of the pressure distribution is equal to 0.226075 Pa. There was an interesting phenomenon, with the increasing of Re the vortex which formed higher and more to the center. Vortex area also greater.
ARPN Journal of Engineering and Applied Sciences, 2014
PitzDaily nozzle was the most substantial component in a gas turbine. This nozzle was used to mix... more PitzDaily nozzle was the most substantial component in a gas turbine. This nozzle was used to mix air with propane. In the application value of turbulence and vortex center was very important for this type of nozzle. Reynolds number was a parameter used to see its effect on the value of turbulence and vortex center. The method applied was a numerical simulation by using OpenFOAM. This simulation was performed to determine the distribution of pressure, streamline, turbulence, and vortex center. The study was conducted by varying Reynolds numbers 12210, 50000, and 100000. Grid independent test was made to validate with the results of previous research. By this simulation results indicated that this method was feasible and the solver was highly accurate. The results showed that the higher the value of Reynolds number, the further away of vortex center rear nozzle. The mark of turbulence and vortex length were also increased. In addition to that the larger the value of this then the mixture of air and propane formed a fine grained, so it became more perfect combustion.
ARPN Journal of Engineering and Applied Sciences, 2014
The increase in energy demand caused by population growth and resource depletion of oil reserves ... more The increase in energy demand caused by population growth and resource depletion of oil reserves as well as the problems of emissions from fossil fuels put pressure on every country, especially Indonesia. Briquettes of corncob were one of the alternatives. In addition replaced the firewood, they also did not potentially damage the ecology of the forest and could replace fossil fuel reserves that were running low. Water boiling test was used to determine the performance of a portable stove with and without fin. Inside the stove there were 3 pots: pot 1 contained egg, pot 2 contained of rice, and pot 3 was vegetables. This study was obtained for the power of furnace for different diameter of briquette 3/4 ", 1" and 1.5" without fins was equal to 0.87 kW, 1.12 kW and 1.57 kW, respectively. Efficiency 17.58%, 19.7%, and 23.15%. While the furnace with diameter briquette 3/4 ", 1" and 1.5" using fins obtained the power 0.98 kW, 1.32 kW and 1.96 KW. Efficiency 14.84%, 20.91% and 25.27%. The fastest cooking time was gained for the finned pan with diameter of briquettes 1.5" over 20 minutes.
ARPN Journal of Engineering and Applied Sciences, 2015
Natural Resources on earth are very abundant one of Natural Resources is Fuel. But the last few y... more Natural Resources on earth are very abundant one of Natural Resources is Fuel. But the last few years the energy is a crucial issue in the world. One alternative is biogas energy. Biogas is a viable energy used technically, socially, and economically mainly to solve the energy problems in rural areas. In the present study, aims to identify and analyze the performance of the biogas stove. In this study, will be tested various forms burner i.e. regular shaped burner, Cyclone 1, and Cyclone 2. The results showed that the power of a cyclone burner biogas stove shape is higher than that using a biogas stove burner usual form. As for the efficiency of biogas stoves shape cyclone burner 2 is higher than the efficiency of biogas stoves that use a form of ordinary burner. From another aspect, namely the mass of the steam generated by the cyclone burner type 2 is greater than the other burne.
In order to understand the effect of porous media on hydraulic jumps, a smoothed particle hydrody... more In order to understand the effect of porous media on hydraulic jumps, a smoothed particle hydrodynamics (SPH) model is applied to investigate the characteristics of hydraulic jumps interacting with porous media. Various porosities including cases without an obstacle or with a solid obstacle or porous media are considered. The opening of a gate was altered to adjust the hydraulic jump. The conjugate depth ratio, bottom shear stress distribution, and energy dissipation are reported. In the present study, validations are in a good agreement with previous studies. Overall, the result showed that the average error between numerical and experimental data was less than 7.2%. Energy dissipation is compared among cases with three porosities, with and without a solid obstacle. The porosity of 0.68 is found to dissipate more energy than do other porosities. Thus, porous media can be used to enhance energy dissipation of hydraulic jumps in an open channel. In conclusion, the proposed SPH model can simulate the effect of porous media on hydraulic jump characteristics.
American Journal of Information Science and Computer Engineering , 2015
Developments in science and technology had prompted us to conduct various experiments to create a... more Developments in science and technology had prompted us to conduct various experiments to create a variety of things, which aims to facilitate and provide benefits for humans and beneficial to the continuation of the next study. Fluid flow across a lid-driven cavity was one of the important phenomena in the fields of engineering, especially fluid mechanics. Some real case such as the air flow in a room was an example of the occurrence of this flow. The method used was numerical simulations using OpenFOAM software to determine the value of the observation of the pressure distribution on the outer and inner wall (2D). Variations of Reynolds numbers used were 40, 100 and 1000. For the kinds of case's lid-driven cavity was used to provide information about the flow phenomena. Further analysis and comparison of the results of the data obtained in order to obtain lid-driven cavity flow phenomena with the potential of increasing the engine work well. From the simulation data obtained that in the case of lid-driven cavity for Reynolds numbers 40 obtained a value of 1.4079 Pa pressure distribution, which causes the formation of eddy (vortex). At Reynold's number of 100 obtained values of 0.738674 Pa pressure distribution which causes the formation of such eddy Reynold's number 40. While at Reynolds numbers 1000 led to declining value of the pressure distribution is equal to 0.226075 Pa. There was an interesting phenomenon, with the increasing of Re the vortex which formed higher and more to the center. Vortex area also greater.
ARPN Journal of Engineering and Applied Sciences, 2014
PitzDaily nozzle was the most substantial component in a gas turbine. This nozzle was used to mix... more PitzDaily nozzle was the most substantial component in a gas turbine. This nozzle was used to mix air with propane. In the application value of turbulence and vortex center was very important for this type of nozzle. Reynolds number was a parameter used to see its effect on the value of turbulence and vortex center. The method applied was a numerical simulation by using OpenFOAM. This simulation was performed to determine the distribution of pressure, streamline, turbulence, and vortex center. The study was conducted by varying Reynolds numbers 12210, 50000, and 100000. Grid independent test was made to validate with the results of previous research. By this simulation results indicated that this method was feasible and the solver was highly accurate. The results showed that the higher the value of Reynolds number, the further away of vortex center rear nozzle. The mark of turbulence and vortex length were also increased. In addition to that the larger the value of this then the mixture of air and propane formed a fine grained, so it became more perfect combustion.
ARPN Journal of Engineering and Applied Sciences, 2014
The increase in energy demand caused by population growth and resource depletion of oil reserves ... more The increase in energy demand caused by population growth and resource depletion of oil reserves as well as the problems of emissions from fossil fuels put pressure on every country, especially Indonesia. Briquettes of corncob were one of the alternatives. In addition replaced the firewood, they also did not potentially damage the ecology of the forest and could replace fossil fuel reserves that were running low. Water boiling test was used to determine the performance of a portable stove with and without fin. Inside the stove there were 3 pots: pot 1 contained egg, pot 2 contained of rice, and pot 3 was vegetables. This study was obtained for the power of furnace for different diameter of briquette 3/4 ", 1" and 1.5" without fins was equal to 0.87 kW, 1.12 kW and 1.57 kW, respectively. Efficiency 17.58%, 19.7%, and 23.15%. While the furnace with diameter briquette 3/4 ", 1" and 1.5" using fins obtained the power 0.98 kW, 1.32 kW and 1.96 KW. Efficiency 14.84%, 20.91% and 25.27%. The fastest cooking time was gained for the finned pan with diameter of briquettes 1.5" over 20 minutes.
ARPN Journal of Engineering and Applied Sciences, 2015
Natural Resources on earth are very abundant one of Natural Resources is Fuel. But the last few y... more Natural Resources on earth are very abundant one of Natural Resources is Fuel. But the last few years the energy is a crucial issue in the world. One alternative is biogas energy. Biogas is a viable energy used technically, socially, and economically mainly to solve the energy problems in rural areas. In the present study, aims to identify and analyze the performance of the biogas stove. In this study, will be tested various forms burner i.e. regular shaped burner, Cyclone 1, and Cyclone 2. The results showed that the power of a cyclone burner biogas stove shape is higher than that using a biogas stove burner usual form. As for the efficiency of biogas stoves shape cyclone burner 2 is higher than the efficiency of biogas stoves that use a form of ordinary burner. From another aspect, namely the mass of the steam generated by the cyclone burner type 2 is greater than the other burne.
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