“…It is found that deviation of our results with experimental study is less than 7% and it is good agreement. Figure 5 Validation 1 . …”
Section: Resultsmentioning
confidence: 99%
“…The management of the heat transfer process is significant for the development of recent engineering and industrial systems and devices 1 , 2 . There are several techniques and materials for isolation have been used and presented in recent years.…”
Enhancement of the heat transfer rate inside the double pipe heat exchangers is significant for industrial applications. In present work, the usage of non-uniform magnetic field on the heat transfer rate of the nanofluid flow streamed inside double pipe heat exchangers are comprehensively studied. Computational technique of CFD is used for the visualization of the nanofluid hydrodynamic in existence of the magnetic source. Influences of the magnetic intensity and nanofluid velocity on the heat transfer are also presented. Simple algorithm is used for the modeling of the incompressible nanofluid flow with addition of magnetic source. Presented results show that magnetic source intensifies the formation of the circulation in the gap of the inner tube and consequently, heat transfer is enhanced in our domain. Comparison of different geometries of tube reveals that the triangle tube is more efficient for improvement of the heat transfer of nanofluid flow. Our results indicate that heat transfer in the tube with triangular shape is more than other configurations and its performance is 15% more than smooth tube.
“…It is found that deviation of our results with experimental study is less than 7% and it is good agreement. Figure 5 Validation 1 . …”
Section: Resultsmentioning
confidence: 99%
“…The management of the heat transfer process is significant for the development of recent engineering and industrial systems and devices 1 , 2 . There are several techniques and materials for isolation have been used and presented in recent years.…”
Enhancement of the heat transfer rate inside the double pipe heat exchangers is significant for industrial applications. In present work, the usage of non-uniform magnetic field on the heat transfer rate of the nanofluid flow streamed inside double pipe heat exchangers are comprehensively studied. Computational technique of CFD is used for the visualization of the nanofluid hydrodynamic in existence of the magnetic source. Influences of the magnetic intensity and nanofluid velocity on the heat transfer are also presented. Simple algorithm is used for the modeling of the incompressible nanofluid flow with addition of magnetic source. Presented results show that magnetic source intensifies the formation of the circulation in the gap of the inner tube and consequently, heat transfer is enhanced in our domain. Comparison of different geometries of tube reveals that the triangle tube is more efficient for improvement of the heat transfer of nanofluid flow. Our results indicate that heat transfer in the tube with triangular shape is more than other configurations and its performance is 15% more than smooth tube.
“…Computational technique widely developed for solving engineering problems. [38][39][40][41][42][43][44][45][46][47][48][49] Besides, this methodology is extensively used for the energy harvesting [50][51][52][53][54] and evaluation of proposed efficient systems in the aerospace applications. [55][56][57][58][59][60][61]…”
Section: Validation and Verification Of Resultsmentioning
Flame stabilization distribution and efficient fuel mixing are highly significant in the performance of ramjet engine. In this paper, numerical studies are done to investigate the supersonic combustion of hydrogen and air co-flow in presence of the ramp edge. In this study, flame maintenance and combustion formation in a dual-combustion ramjet engine are fully investigated. The primary emphasis of this work is to disclose the impact of produced shocks due to the existence of ramp edge on the structure of fuel and air-jet immediately downstream of injector. The shock interactions of two different angles (10 deg and 30 deg) of the ramp edge are investigated. Favre-averaged conservation equations are considered for the simulation of compressible flows inside the combustor. Various mechanisms expressing the flame spreading characteristics are also examined. Depending on the angle of the ramp edge, the produced shock waves influence on size and strength of vortices. Our findings also show that high angles of ramp edge augment the fluctuation of the vortices by the splitter and consequently, fuel mixing enhances in the combustion chamber of ramjet engine. Our findings also confirm that the similar jet pressure would be more effective on the vortex production downstream of the splitter. The application of ramp edge with angle of 30 deg would increase average momentum thickness of the mixing layer up to 55%.
“…Nano uids are a solid-liquid mixture of material including nanometer-sized solid particles in a traditional uid [22]. In recent years, nano uids are used in many engineering applications such as heat transfer systems and machining processes due to their excellent heat transfer capabilities and tribological properties [23][24][25]. The literature review presented that the use of nano uids in metal cutting enhances the heat transfer, which leads to reduced cutting forces, coe cient of friction, power consumption, tool wear, and cutting temperature [9,10].…”
This paper presents the effect of surface texturing and CNT enriched nanofluid lubrication on the cutting performance of cemented carbide cutting inserts during the turning of Aluminum 7075 alloy. This alloy is widely used in various industries due to its excellent properties such as high corrosion resistance, high strength to weight ratio, and good formability. Although aluminum alloys have good cutting properties because of their low strength, they adhere between tool and chip on the rake face in machining processes, and this results in the low surface finish of machined components. To solve this problem, the use of textured tools under nanofluid lubrication is proposed in this study. Firstly, different shape of textures was fabricated on the rake face, and effective texture was determined using experimental tests. Then, turning tests were carried out using the selected textured tool under CNT enriched nanofluid lubrication to enhance the cutting performance of the machining process. Results showed that the linear microgrooves perpendicular to chip flow direction have better performance in comparison to other shapes of texture. Our findings revealed that the main cutting force, built-up edge, and surface finish were reduced up to 32%, 37%, and 19% using the selected textured tool under CNT enriched nanofluid lubrication compared to dry turning condition.
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