Numerical Study of the Dynamics of a Cyclone Modeled by a Vertical Vorticity Vector Considering a Radial Velocity as a Function of Time
Alioune Faye,
Mamadou Bamba Sene,
Cheikh Mbow
Issue:
Volume 12, Issue 1, January 2023
Pages:
1-8
Received:
26 August 2022
Accepted:
17 October 2022
Published:
17 January 2023
Abstract: In this article, the work carried out is a numerical study of the dynamics of a cyclone modeled by a vertical vorticity vector by considering a radial velocity as a function of time t. We made a short general study on cyclones by modeling a vertical cyclone starting from the Navier-Stokes equations. A study of the vorticity as a function of the radius and as a function of the radial abscissa at different times has been made. We also studied the radial and ortho radial components of the velocity as a function of the radius and as a function of the radial abscissa by varying the Ekman number and the Rossby number by looking at their impacts when they are increased or they are reduced. In the same dynamics, the influence of the decrease in the suction speed over time on the radius of the vortex core has been studied. In short, we have studied the effects of the variation of the radial velocity as a function of time. We ended our study by showing that the Ekman number is the most important parameter in the dynamics of the cyclone, by showing the relationship that exists between the Ekman number and the growth of the rotational motion of a cyclone.
Abstract: In this article, the work carried out is a numerical study of the dynamics of a cyclone modeled by a vertical vorticity vector by considering a radial velocity as a function of time t. We made a short general study on cyclones by modeling a vertical cyclone starting from the Navier-Stokes equations. A study of the vorticity as a function of the rad...
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Impact of Variant Fibre Blend Ratios, pH Levels and Finishing Types on Comfort Properties of Polyester/Cotton Knitted Fabric
Muhammad Qamar Tusief,
Muhammad Hussain Sabir
Issue:
Volume 12, Issue 1, January 2023
Pages:
9-13
Received:
24 November 2022
Accepted:
4 January 2023
Published:
17 January 2023
Abstract: Today is the era of value added textiles. The people like to have comfortable dressing in addition to have aesthetic quality. Comfort is the key factor of all kinds of fabrics especially for knitted fabric and has a significant role in their selection. Generally the comfort properties of the knitted fabric are related to its thermal and moisture transmission behavior. The comfort of knitted fabric depends upon many factors like fibre types and their blend ratios; pretreatment, dyeing and finishing processes, various pH levels during dyeing and processing. The application of synthetic fibres with natural ones is carried out for some kind of value addition in the resultant product. Polyester and Cotton (P/C) blend is the most popular blend in the textile sector. Both fibres play significant role in the comfort related characteristics of the manufactured fabric. The variant blend ratios of these fibres significantly affect the comfort of the resulted fabric. Hence keeping in view all this the present research study was planned to have a comprehensive observation on the comfort of the P/C blended knitted fabric under variant blend ratios, pH levels and finishing types. The study revealed a significant impact of all designated factors on the comfort properties of the knitted fabric.
Abstract: Today is the era of value added textiles. The people like to have comfortable dressing in addition to have aesthetic quality. Comfort is the key factor of all kinds of fabrics especially for knitted fabric and has a significant role in their selection. Generally the comfort properties of the knitted fabric are related to its thermal and moisture tr...
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