Search results

São Leopoldo, RS, Brazil 93022-000 1fabio@flk.com.br, 2petrodriguesf@gmail.com, 2decesaroo@gmail.com Keywords: PCM, CFD, Thermal Storage, Fluent Abstract.
“A review on phase-change materials: Mathematical modeling and simulations”.

The assessment of the thermo-hydraulic behavior under transitional heat transfer regimes is pursued by means of system code simulations, RANS CFD simulations, LES and DNS, and experimental investigations.
Iwatsu et al. [18] and Iwatsu and Hyun [19] conducted respectively two and three-dimensional numerical simulation of mixed convection in a square cavity heated from the top moving wall.
Results and Discussion Present numerical simulations are presented for various values of the Reynolds number in the range of 1 ≤ Re ≤ 600, various values of the Grachof number in the range of 24,5 ≤ Gr ≤ 33480 and two Prandtl Number, Pr = 0,015 and 0,71.
[8] K.Ghachem, L.Kolsi, C.Mâatki, A.K.Hussein, and M.Borjini, Numerical simulation of three-dimensional double diffusive free convection flow and irreversibility studies in a solar distiller , International Communications in Heat and Mass Transfer39, 869-876 (2012)
[10] A.K.Hussein, Finite volume simulation of natural convection in a trapezoidal cavity filled with various fluids and heated from the top wall , Universal Journal of Fluid Mechanics, 1, 24-36 (2013)

Therefore, Using 2-D CFD model to replace widely used building thermal simulation software to analysis intermittent and compartmental energy consumption of cooling/heating by air-conditioners for residential buildings in hot summer and cold winter zone in China is necessary.
A typical two-bedroom flat of a certain residential district in Hangzhou China is selected here as the computational fluid dynamics (Fluent 12.0) simulation model.
In this simulation model, the daytime solar radiation did not directly affect the typical daily heating/cooling load，because the air condition operating during the night (22:00-6:00); (v) assuming that the room is empty and excluding the impact of the furniture thermal storage effect.

(12) Numerical procedure The numerical simulation is carried out by using the commercial CFD package ANSYS-CFX.
Fig. 2: Typical grid used for simulation.
The simulations results are presented in the form of streamlines and isotherms contours along with variations of some representative global flow and heat transfer quantities.

Future simulations and experiments using commercial software, such as Moldex3D, may help validate these theoretical calculations and refine the design process for more optimized microfluidic systems. 4.
Future work will address this limitation by incorporating the effects of channel orientation, with validation of the model anticipated through the use of commercial simulation software, such as Moldex3D.
Wilkes, Fluid Mechanics for Chemical Engineers with Microfluidics, CFD, and COMSOL Multiphysics 5, Third Edition, Pearson, 2017 [23] A.
Jayaraj, Computational Simulation of Electroosmotic Flow Using Immersed Boundary Method, Int J Micronano Scale Transp. 2 (2011) 129–150

The ever continuing advances in terms of IT resources are mainly being dedicated by analysts to increasing CAE model complexity, for which then only a limited number of deterministic simulations are performed; this holds for a range of CAE approaches, including Finite Element (FE) analysis, Computational Fluid Dynamics (CFD) and Multi-Body Simulation (MBS).
For high-dimensional problems (number of inputs >15), alternative Advanced Simulation Methods have been worked out [4], with Line Sampling and Subset Simulation the most relevant.
Sources of uncertainties in different design engineering disciplines 2.1 Automotive crash and safety simulations.
The suspension subsystem is part of a complete vehicle that has been analyzed using a multi-body simulation.
Conclusions This paper deals with the role and importance of uncertainties in different engineering design and test disciplines: crash and safety simulations, mechatronics system simulations and modal analysis.

The numerical simulations highlighted that confinement effects affected the recirculating bubble detaching from the target surface.
On the experimental side, it mentioned the investigation, pointed out by Prakash et al., who considered turbulent round jets in a cylindrical enclosure with porous media: they presented laser Doppler velocimetry measurements and carried out comparisons with the CFD simulations [91],[92].
Simulations showed a significant enhancement close to the end of the heated part of the plate and an increase of Nusselt number for high Peclet numbers.
The governing equations were solved numerically employing the Ansys-Fluent CFD code.
Saeed (2009), Simulation of Heat Transfer from Hot-Air Jets impinging a Three-Dimensional Concave Surface, Journal of Aircraft 46, pp. 721-725

A branch & bound (B&B) [13,14] fitting algorithm, which compares the computed signal and the measured signal, and changes the assumed transport parameters to systematically reduce the (chi-square) differences between simulation and experiment.
The branch & bound algorithm runs for a defined numbers of super cycles, after which the deviation between experiment and simulation can be evaluated.
Concerning b): The time spread function can be derived either experimentally (applying a controlled mixture of gases in the permeate chamber) or can be simulated by computational fluid dynamics (CFD).
Arbeiter et al, Simulations and uncertainty analysis for a hydrogen diffusion experiment using a “two side purged membrane” setup, Fus.

The study found that optimal orientation of the solar still, based on geographic location, significantly enhances solar absorption and daily water productivity, highlighting orientation as a key design factor [16]. developed a new CFD model that couples energy and mass equations to improve the accuracy of solar still simulations [17].
Optimizing the length, width, and depth of single-slope solar stills significantly improves evaporation and condensation efficiency, resulting in increased water productivity [20]. developed a model and simulation of a trapezoidal solar collector, demonstrating that the inclined geometry enhances solar radiation absorption and heat distribution, resulting in an increase in the thermal efficiency of the collector compared to traditional designs [21].
The distance between the two plates is specified, as the distance between the plates (t) was determined by simulation to be 2 mm, its length (L) is 100 mm, and its width (W) is 500 mm.

Numerical Simulation FEM model.
ABAQUS 6.14-1 was used to solve all the simulations performed in this paper on a high-performance desktop.
A PC with a 64-bit operating system was used for the simulations.
A local stiffness reduction method was used to model the cracks in the numerical simulations.
Maré, An investigation of CFD simulation for estimation of turbine RUL, Master of Engineering (Mechanical Engineering), Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria, 2018