The impact of rotational speed and water volume on textile translational motion in a front-loading washer

Abstract

Textile motion in a front-loading washer has been characterized via video capturing, and a processing system developed based on image geometric moment. Textile motion significantly contributes to the mass transfer of the wash solution in porous materials, particularly in the radial direction (perpendicular to the rotational axis of the inner drum). In this paper, the velocity profiles and residence time distributions of tracer textiles have been investigated to characterize the textile dynamics in a front-loading washer. The results show that the textile motion varies significantly with the water volume and rotational speed, and that the motion path follows certain patterns. Two regions are observed in the velocity plots: a passive region where the textile moves up with low velocity and an active region where the textile falls down with relatively high speed. A stagnant area in the residence time profile is observed. This corresponds to the passive region in the velocity profile. The stagnant area affects the mechanical action, thus influencing washing efficiency and textile performance. The findings on textile dynamics will help in the development of better front-loading washers.

Determining optimal drying conditions through analysis of the sample movement in a heat pump dryer

“…Because the total drying loads moved together owing to the centrifugal force, every sample exhibited a similar movement; hence, the outline fluctuation was small. 22…”

“…Moreover, to understand the frame-to-frame degree of movement of the sample, the average change, referring to the average of the change between frames, was considered. 24 When the hot air flow and the drum rotation worked together, the distance from the center of the drum (average change) and the distance from the drum wall (average change) were the highest, indicating that the movement between frames varied the most. In addition, the speed difference between the drum and the sample (average, standard deviation, average change), the total movement distance of the sample center, position factor, the appearance area within the 1/2 drum radius, number of tumbling, and appearance frequency were also the highest.…”

“…Because the total drying loads moved together owing to the centrifugal force, every sample exhibited a similar movement; hence, the outline fluctuation was small. 22 Movement indices of the tracing sample and total drying loads. The sample movement indices determined were distance from the center of the drum, speed difference between the drum and sample, angle change of the sample center between frames, distance of the sample center between frames, and total movement distance of the sample center (tracing sample movement indices fundamental to movement analysis) and the occupied area (total drying loads movement indices).…”

STEM Approach in Assessment of Microplastic Particles in Textile Wastewater

“…Since washing takes place in a closed, well-mixing solid-liquid system with physical and chemical reaction, the study of hydrodynamic effects can be carried out according to theoretical (solution of the equation Navier Stokes) and experimental (tracer experiment) approaches [16]. This has been the subject of numerous studies with the aim of better describing the motion in the washing machine in order to optimize the washing process [14,[17][18][19][20][21][22][23].…”

Detergency prediction in front-loading washing machines using discrete element method

“…4 Similarly, attempts have been made to analyze the effects of the rotation speed and amount of water on the motion patterns of the test fabric. 20…”