Top 5 Engrxiv Papers Today


2.049 Mikeys
#1. One-Dimensional Numerical Analysis of Cross-Sectional Area Variation Effects on Flow through the Gas Turbine Diffuser
Nima Zamani Meymian, Reza Khodadadi
In the paper, a one-dimensional compressible flow of gas inside the gas turbine’s diffuser has been simulated. The modeling has been performed to the aim of obtaining boundary conditions of outlet gas from diffuser and inlet gas to the combustion chamber. Depending on working flow regimes of fluid including subsonic, transonic, and supersonic flows, changes of diffuser cross-section have different effects on gas flow characteristics. For these effects to be correctly imposed, Mach number of the gas flow in each time-step affected by changes of cross-section would be determined, depending on the local Mach number in the same time-step. Obtaining distribution of Mach number along diffuser length, changes in other main characteristics of flow such as pressure, temperature, speed, and density for all of the points along diffuser length would be obtained. In order to verify the validity of the numerical algorithm used, the gas flow would be solved in a divergent nozzle and compared to other numerical methods. In the end, using gas...
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engrXiv: "One-Dimensional Numerical Analysis of Cross-Sectional Area Variation Effects on Flow through the Gas Turbine Diffuser" - https://t.co/0FHmOkU3yb #engineering
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Authors: 2
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2.049 Mikeys
#2. A Hybrid Model to Predict the Gyratory Compaction of Hot Mixed Asphalt
Teng Man
The compaction of asphalt mixture is crucial to the mechanical properties and the maintenance of the pavement. However, the mix design, which based on the compaction properties, remains largely on empirical data. We found difficulties to relate the aggregate size distribution and the asphalt binder properties to the compaction behavior in both the field and laboratory compaction of asphalt mixtures. In this paper, we would like to propose a simple hybrid model to predict the compaction of asphalt mixtures. In this model, we divided the compaction process into two mechanisms: (i) visco-plastic deformation of an ordered thickly-coated granular assembly, and (ii) the transition from an ordered system to a disordered system due to particle rearrangement. This model could take into account both the viscous properties of the asphalt binder and grain size distributions of the aggregates. Additionally, we suggest to use the discrete element method to understand the particle rearrangement during the compaction process. This model is...
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engrXiv: "A Hybrid Model to Predict the Gyratory Compaction of Hot Mixed Asphalt" - https://t.co/FMzCbH7q5Z #engineering
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2.007 Mikeys
#3. Chatbot in isiXhosa for Remote Pre/post-Natal Care
Amit Mishra
In this work we present the development of an isiXhosa ChatBot, a ChatBot developed for pre and postnatal care in the Southern African language of isiXhosa. Multiple implementations of User Interfaces were developed - notably the Android Mobile Application Implementation and the WhatsApp Integration Implementation. We deem this as an enabler for providing first-hand health-care advisors in remote African communities.
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engrXiv: "Chatbot in isiXhosa for Remote Pre/post-Natal Care" - https://t.co/Fz9mMSKsGV #engineering
mister_mangu: An amazing piece of work done in record time. Thanks, @carla.wilby for the awesome hard work and work ethics. #sustainabledevelopmentgoals #chatbots #ehealth #africa https://t.co/gV1Hl0brbX
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Authors: 1
Total Words: 3037
Unqiue Words: 1080

1.998 Mikeys
#4. A Novel Method for Developing Compressor’s Characteristic Curves Due to the Guide Vane Stagger Angle Variation
Alireza Navai, Nima Zamani Meymian
One-dimensional models of analyzing gas turbines as a whole require characteristic curves of pressure coefficient (ψ) based on flow coefficient (φ) and the characteristic curve of compressor’s efficiency of stages so that compressor performance would be predicted. Variation of stagger angle of the stage’s inlet guide vane stated as a geometrical variation of the stage would be resulted in the displacement of pressure coefficient characteristic curve based on the stage’s flow coefficient. Performance nature of compressor stage is in a way that under this condition, the efficiency characteristic curve will remain intact. In this paper, a method would be presented to predict variations of pressure coefficient characteristic curve based on flow coefficient against variations in stagger angle of stage’s guide vane so that one-dimensional modeling of axial flow compressor would be made, through characteristic curves.
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engrXiv: "A Novel Method for Developing Compressor's Characteristic Curves Due to the Guide Vane Stagger Angle Variation" - https://t.co/orvTI5w9Oy #engineering
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Authors: 2
Total Words: 1724
Unqiue Words: 612

1.997 Mikeys
#5. Saving water at Cape Town schools by using smart metering and behavioural change
Martine Visser, M.J. Booysen, Kenneth Berger, Johanna Brühl
The city of Cape Town suffered a severe water crisis in 2018. At the peak of the drought in South Africa’s Western Cape, a randomised control trial at 105 schools investigated the impact of two behavioural interventions to encourage responsible water usage: detailed water usage data feedback from smart meters, and an interschool competition. Interventions reduced water usage in these schools by 15 to 26%. The information feedback was found to be more effective in reducing night time water use, indicating better water usage by the staff, while the competition was found to be more effective during the day time, indicating better water usage by the pupils. The contrast highlights the way feedback was understood differently by the two groups, with different effects on their assumption of responsibility. This example from Cape Town demonstrates the effectiveness of combining smart technologies with nudges. It provides a model of water conservation interventions for sustainable cities.
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engrXiv: "Saving water at Cape Town schools by using smart metering and behavioural change" - https://t.co/m7Mq4vBXzZ #engineering
mjb_su: Preprint: "Saving #water @CityofCT schools by using smart metering & behavioural change" https://t.co/eJl81G7CVe. https://t.co/jVsrX69QWe with @Shoprite_SA @CapeTalk @Bridgiot @WC_EduMin @WesternCapeGov @UCT_news @StellenboschUni #behavioraleconomy #drought #dayzero https://t.co/3QHxrYgINV
Bridgiot: RT @mjb_su: Preprint: "Saving #water @CityofCT schools by using smart metering & behavioural change" https://t.co/eJl81G7CVe. https://t.co…
Jason_A_Samuels: RT @mjb_su: Preprint: "Saving #water @CityofCT schools by using smart metering & behavioural change" https://t.co/eJl81G7CVe. https://t.co…
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Authors: 4
Total Words: 8831
Unqiue Words: 2998

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