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Advances in Simulation Studies for Developing Energy-Efficient Buildings
Published in Amritanshu Shukla, Atul Sharma, Sustainability through Energy-Efficient Buildings, 2018
Karunesh Kant, Amritanshu Shukla, Atul Sharma
CFD is the science of envisaging fluid flow, heat and mass transfer, chemical reactions, and related phenomena by solving numerically the set of governing mathematical equations conservation of mass, conservation of mass, momentum, energy, species and effects of body forces. The results of CFD studies are relevant in conceptual studies of new designs, detailed product development, troubleshooting, and redesign. The Fluent is the world leader in the rapidly growing field of design simulation software used to predict fluid flow, heat and mass transfer, chemical reaction, and related phenomena. The Fluent software is used by engineers in corporations globally for the development of the product, design optimization, troubleshooting and retrofitting. With the application of Fluent and CFD, engineers are able to perform faster analysis at a reduced cost with the end result being an improved design, by solving the fundamental heat and mass transfer equations; Fluent offers information on important flow characteristics such as pressure loss, flow distributions, and mixing rates. Fluent modeling overview is represented in Figure 11.7. Liping et al. [3] carried out parametric analysis of facade designs on alignments, window-to-wall ratios and shading expedients were achieved for two usual weeks by coupled simulations between BS ESP-r and CFD (FLUENT). Four ventilation strategies: (1) night-time only ventilation, (2) daytime-only ventilation, (3) full-day ventilation, and (4) no ventilation, were evaluated for the hot–humid climate. The results indicate that full-day ventilation for indoor thermal comfort is better than the other three ventilation strategies.
Design and Neutronic, Thermal-Hydraulic Analysis of DSCF Assembly for a SMR and Investigation of the Effect on the Thermal Power Uprate
Published in Nuclear Technology, 2023
Hossein Zayermohammadi Rishehri, Majid Zaidabadi Nejad
FLUENT is one of the most popular and powerful computational fluid dynamics (CFD) software in the field of simulating a variety of physical models. In order to use FLUENT, the flow geometry and meshing are determined by other software, such as GAMBIT. Like much other software for CFD analysis, FLUENT uses numerical methods to solve problems, which is a potent method for CFD. In this method, by converting the partial differential equations governing fluids into algebraic equations, it is possible to solve these equations numerically. By dividing the area into smaller elements and applying boundary conditions to the boundary nodes and by applying approximations, a system of linear equations is obtained, and by solving these algebraic equations, velocity field, pressure, and temperature are obtained in the desired area. This method is known as the finite volume method.17
A flow-rate-controlled double-nozzles approach for electrochemical additive manufacturing
Published in Virtual and Physical Prototyping, 2022
Yawen Guo, Pengpeng Liu, Pengfei Jiang, Yongshuai Hua, Kaiyuan Shi, Hui Zheng, Yabin Yang
A 2D numerical local model of the meniscus is established to investigate the sensitivity of the meniscus stability to the flow rates of the feed and suction nozzles. The simulation is performed on the commercial computational fluid dynamics (CFD) package Fluent. The volume of fluid (VOF) approach in Fluent is employed to track the interface of the liquid and air (Dewangan et al. 2020; Ding et al. 2015; Pandiella et al. 1999). The computational domain and boundary conditions (BCs) of the 2D model are schematically illustrated in Figure 2(a). It is of interest to note that in practice the air in the triangle area between the two nozzles (the area above the contacted point of the two nozzles) may also be inhaled into the suction nozzle. However, for simplification, this is neglected in the model as the amount of air being sucked into the suction nozzle from that area is anticipated small, especially in a 2D model that the two nozzles are tip to tip contacted, which prevents the air flow between the two regions that above and below the contacted point. A velocity BC is prescribed for the feed nozzle at the inlet, and instead of applying a velocity BC for the suction nozzle at the outlet, a vacuum pressure BC with respect to the standard atmosphere is imposed. The vacuum pressure BC is used to represent the influence of the suction rate. The BCs for the other boundaries of the computational domain are prescribed with zero velocity. The substrate is not included at this stage and the modelling parameters are detailed explained in the Supplementary Information (Section S2.1).
Three-dimensional numerical investigation of hybrid nanofluids in chain microchannel under electrohydrodynamic actuator
Published in Numerical Heat Transfer, Part A: Applications, 2023
Milad Amiri, Dariusz Mikielewicz
As the state of the art of CFD methodology, the commercial software FLUENT is a powerful computational package which is widely used in the industrial and academic field to simulate heat transfer and fluid flow. However, it does not have a default module to assist users in analyzing electrohydrodynamic phenomena. In this article, simulation of chain microchannel in FLUENT based on its UDF (User Defined Function), UDM (User define Memory) and UDS (User Defined Scalar) has been developed.