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Volumes and surface areas of common solids
Published in John Bird, Basic Engineering Mathematics, 2017
A cuboid is a solid figure bounded by six rectangular faces; all angles are right angles and opposite faces are equal. A typical cuboid is shown in Fig. 28.1 with length l, breadth b and height h. Volumeofcuboid=l×b×h $$ \begin{aligned} \mathbf{Volume of cuboid} \boldsymbol{= \, l \times b \times h} \end{aligned} $$
Volumes and surface areas of common solids
Published in John Bird, Bird's Basic Engineering Mathematics, 2021
A cuboid is a solid figure bounded by six rectangular faces; all angles are right angles and opposite faces are equal. A typical cuboid is shown in Fig. 28.1 with length l, breadth b and height h.
Volumes of common solids
Published in John Bird, Science and Mathematics for Engineering, 2019
A cuboid is a solid figure bounded by six rectangular faces; all angles are right angles and opposite faces are equal. A typical cuboid is shown in Figure 14.1 with length l, breadth b and height h.
Procedure for determining design accidental loads in liquified-natural-gas-fuelled ships under explosion using a computational-fluid-dynamics-based simulation approach
Published in Ships and Offshore Structures, 2022
The gas cloud geometric data are important parameters since the CFD code models fuel as vapour. In a study, the gas dispersion analysis generated 50 different gas clouds as a Q9 equivalent gas cloud volume (Nubli and Sohn 2020). The gas cloud is required for re-processing because of its inhomogeneous shape. Therefore, a Q9 equivalent gas cloud could be used to obtain a homogeneous shape gas cloud with uniform stoichiometric concentration (Hansen et al. 2013; Tam et al. 2021) and it has been standardised according to NORSOK Z-013 for a CFD-based probabilistic explosion simulation approach (NORSOK 2001). Hence, the dimensions of a gas cloud are difficult to determine. In some previous studies, the actual gas clouds were converted to equivalent gas clouds with a uniform shape such as a cube or a rectangular cuboid (Hansen et al. 2013; Kim 2016; Jin and Jang 2020). A different geometric ratio may be considered in an equivalent gas cloud (Jin and Jang 2020). In this work, a cube-shaped gas cloud was applied in the CFD simulation. Figure 3 illustrates the equivalent gas cloud shapes. The equivalent gas cloud dimensions can be determined using a cubical root as follows: where DGC denotes a gas cloud dimension such as length, width, or height. VGC is the equivalent gas cloud volume in cubic metres obtained from the Kameleon FireEx (KFX) software results.
Evaluation of two low-cost PM monitors under different laboratory and indoor conditions
Published in Aerosol Science and Technology, 2020
Ruikang He, Taewon Han, Daniel Bachman, Dominick J Carluccio, Rudolph Jaeger, Jie Zhang, Sanjeevi Thirumurugesan, Clinton Andrews, Gediminas Mainelis
The AEC setup is shown in Figure 1. The AEC was retrofitted with the appropriate plumbing and wiring for calibration applications. The testing was performed under ambient conditions at the outdoor test facility of CH Technologies. The AEC is constructed of 316 stainless steel sidewalls and polycarbonate door panels. It has a shape of a rectangular cuboid with a pyramid-shaped expansion space at its bottom. The cuboid's internal dimensions are 0.6 m wide x 1.2 m deep x 1.2 m high (860 L), while the total internal volume is 1000 L. The chamber was operated at a negative pressure of ∼1-inch H2O. One horizontal end of a T-connector, equipped with a HEPA filter, provided filtered dilution air for the chamber. A 4-jet Blaustein Atomizer (BLAM) was mounted to the opposite horizontal end of the T-connector, and the resulting aerosol was mixed with the dilution air and delivered into the chamber. The BLAM was operated at 5 L/min aerosolization flow. A uniform aerosol mixing was assured with a Stairmand disk positioned below the inlet (Moss and Briant 1983). Aerosol mixing was further enhanced with two 5-inch computer fans on opposing sides of the chamber. The aerosol was exhausted by a vacuum pump and passed through a filter before being vented to outside. Here, a variable DC supply and centrifugal blower were set to deliver a 135 L/min flow rate.
Development and experimental investigation of a novel combined solar cooker and dryer unit
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2020
Muhammad Zeeshan Siddique, Abdul Waheed Badar, Shan Ali Jakhrani, Muhammad Yasin Khan, Fahad Sarfraz Butt, M. Salman Siddiqui
The dryer compartment is a rectangular cuboid in which two meshed trays are installed for placing of the food products to be dried. Doors are provided at the backsides of the cooker and the dryer compartment for placing and removing the food items, as shown in Figure 3(b). The dryer chamber is easily detachable from the cooker unit and can be very conveniently placed at the top of the cooker unit where circular air passages are provided for the flow of hot air from the cooker to the dryer chamber, as illustrated in Figure 3(a). The airflow passages can be very conveniently opened or closed with the aid of a sliding mechanism provided at the interface of the cooker and dryer unit. As no fan/blower is installed, therefore, the flow of air is entirely by natural convection in the whole unit.