Analyzing efficiency of ventilation elements used in protective clothing with simplified model
2024
Vejanand, Sanjay-Rajni | Janushevskis, Alexander | Vaicis, Ivo
Applications of Computational Fluid Dynamics (CFD) extend to a wide range of academic disciplines, research studies, and industries. The importance of CFD validation and verification is growing as ventilation and fluid flow interaction problems are more complex and difficult to solve. Such problems usually take large computational time to provide solution depending on complexity of the model. Some problem depending on its definition can be simplified to reduce the high computation time. This study involves the simulation of two different models, referred as case 1 and case 2, in order to evaluate the efficiency of two distinct ventilation elements, E1 and E2, with different shapes. The first model is a simplified elliptical shape of the human body with a protective jacket that is 500 millimetres in height and consists of ten outlets and a single inlet. In the second case, this model is simplified by having a considerably smaller area; it is composed of two square plates with dimensions of 40×40 mm. In this case, one plate is a representation of a jacket surface that has a single inlet, and the other plate represents a human body. SolidWorks Flow Simulation is used to simulate both models individually to compare efficiency of ventilation elements E1 and E2. The flow simulation results in the first case do not provide sensitive values for the comparison, while in the second case sensitivity of results increases and it shows that the element E1 provides better cooling efficiency than E2. The results also indicate that computational time in the second case is reduced 15 times.
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出版者 Latvia University of Life Sciences and Technologies