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RISS 인기검색어
- 검색키워드
- 저자 : Abdul Jaleel (검색결과 3 건)
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Abdul Jaleel,Tayyeb Mahmood,Ahsen Tahir,Shehzad Aslam,Ubaid Ullah Fayyaz 한국통신학회 2022 ICT Express Vol.8 No.4
The interoperability concerns horizontal integration among IoT devices which form vendor- or protocol-specific silos. To answer, this brief presents an architectural design of an autonomic interoperability manager (AIM) that is capable of self-configuration, self-healing, self-optimization, and self-protection. With AIM, IoT devices having diverse protocols, syntax, and semantics can collaborate and interact, and its plugin-based autonomic, service-oriented architecture ensures scalability and extendability. We simulated a healthcare use-case with a range of virtual IoT devices to demonstrate that the AIM dramatically reduces the average response time in a highly dynamic environment, by proactively pruning the network traffic and optimizing the compute resources.
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Numerical simulation of jet flow impinging on a shielded Hartmann whistle
Michael, Edin,Narayanan, S.,Jaleel. H, Abdul The Korean Society for Aeronautical and Space Scie 2015 International Journal of Aeronautical and Space Sc Vol.16 No.2
The present study numerically investigates the effect of shield on the flow characteristics of Hartmann whistle. The flow characteristics of un-shielded Hartmann whistle are compared with whistles of different shield heights 15 mm, 17 mm, 20 mm, 25 mm and 30 mm. The comparison of Mach number contours and transient velocity vectors of shielded Hartmann whistles with un-shielded ones for the same conditions reveal that the presence of shield causes the exiting jet to stick to the wall of the shield without causing spill-over around the cavity inlet, thus sustaining the shock oscillation as seen in the unshielded Hartmann whistle, which has intense flow/shock oscillation and spill-over around the cavity mouth. The velocity vectors indicate jet regurgitance in shielded whistles showing inflow and outflow phases like un-shielded ones with different regurgitant phases. The sinusoidal variation of mass flow rate at the cavity inlet in un-shielded Hartmann whistle indicates jet regurgitance as the primary operating mode with large flow diversion around the cavity mouth whereas the non-sinusoidal behavior in shielded ones represent that the jet regurgitance is not the dominant operating mode. Thus, this paper sufficiently demonstrates the effect of shield in modifying the flow/shock oscillations in the vicinity of the cavity mouth.
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Numerical simulation of jet flow impinging on a shielded Hartmann whistle
Edin Michael,S. Narayanan,Abdul Jaleel. H 한국항공우주학회 2015 International Journal of Aeronautical and Space Sc Vol.16 No.2
The present study numerically investigates the effect of shield on the flow characteristics of Hartmann whistle. The flow characteristics of un-shielded Hartmann whistle are compared with whistles of different shield heights 15 mm, 17 mm, 20 mm, 25 mm and 30 mm. The comparison of Mach number contours and transient velocity vectors of shielded Hartmann whistles with un-shielded ones for the same conditions reveal that the presence of shield causes the exiting jet to stick to the wall of the shield without causing spill-over around the cavity inlet, thus sustaining the shock oscillation as seen in the unshielded Hartmann whistle, which has intense flow/shock oscillation and spill-over around the cavity mouth. The velocity vectors indicate jet regurgitance in shielded whistles showing inflow and outflow phases like un-shielded ones with different regurgitant phases. The sinusoidal variation of mass flow rate at the cavity inlet in un-shielded Hartmann whistle indicates jet regurgitance as the primary operating mode with large flow diversion around the cavity mouth whereas the non-sinusoidal behavior in shielded ones represent that the jet regurgitance is not the dominant operating mode. Thus, this paper sufficiently demonstrates the effect of shield in modifying the flow/shock oscillations in the vicinity of the cavity mouth.
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