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Secondly, the design of appropriate and efficient bioreactor type is crucially important, and requires further research. thirdly ,but not finally, process modeling and CFD simulation can help guide the bio-hydrogen production of food waste and provide insight into scaled-up application.Overall, food waste fermentation for bio-hydrogen production is promising for the sustainable development of hydrogen.

Theoretical experiment based on computational models in FDS (Fire Dynamics Simulation), software based on FEM (finite element model) or practical experiment that examines combustion of candles in an experimental chamber.
In a theoretical experiment a model of candle combustion created and computed in CFD software called FDS.
In this case the simulation of candle combustion is placed in an area with dimensions 200x200x1000mm (fig. 6).
The focus of this simulation is to display the temperature distribution during combustion and the dispersion of released particles.
So if the prediction is not correct and the simulation shows it, there is no harm caused to the building.

Simulations were performed using the finite volume method and ANSYS Fluent.
Mirabedin (2016) [11] introduced two-dimensional numerical simulation to examine natural convection in right-angled triangular enclosures filled with water, focusing on the influence of Rayleigh number and aspect ratio.
Governing equations the simulation of airflow within the domain is governed by the fundamental conservation equations of mass (continuity), momentum, and energy.
Minor deviations are observed in the mid-region, where the temperature gradient is relatively small, but these discrepancies remain within acceptable limits and do not detract from the overall fidelity of the simulation.
“CFD Modeling of Natural Convection in Right-Angled Triangular Enclosures.”

The flow and temperature fields at the conditions similar to that of experiments were computed with CFD software to support the experimental results and help to explain the physics.
Yang et al. [15] conducted numerical simulation of a slot jet impinging on a semi-circular concave surface using the turbulence model.
Numerical simulation shows that, with the help of the trapping hole, the jet potential core reaches the stagnation zone.

A study by Kiya and Arie [15] executed a two-dimensional numerical simulation for viscous fluid flow past semicircular and semi-elliptical objects fixed to a plane surface.
Chatterjee et al. [2] performed an unsteady two-dimensional computational study using the commercially available CFD software FLUENT to examine the laminar forced convection heat transfer for fluid flow past a semicircular cylinder with two configurations in an unconfined medium (Re=50~160 with a fixed Prandtl number of 0.7).
The flow features in the wake region, like velocity zone, stagnation point and gradual increase of mean velocity are well captured in the numerical simulations.
Krajnovi c´, Very Large Eddy Simulation of Passive Drag Control for a D-Shaped Cylinder, J. of Fluids Engng, 135 (2013). https://doi.org/10.1115/1.4024654
[25] D.L.Savicki, A.Goulart, and G.Z.Becker, The simplified k-e Turbulence Model Applied to Numerical Simulation of the Stable Atmospheric Boundary Layer. 

Zhou et. al. 2021 [2] conducted an experimental and numerical simulation of indirect/ thermoelectric assisted direct evaporative cooling system.
Their results showed that the experimental and simulation were agreed within +-10% error.
They also used finite element simulation to verify and compare with the theoretical calculation.
Their result showed that the theorical and simulation results are very close, and the optimal power supply mode depend on the multi-TEC configuration.
CFD analysis for predicting cooling time of a domestic refrigerator with thermoelectric cooling system.

However, the geometric symmetry of the panel and boundary conditions were taken into account in the simulation.
The temperature values obtained from the simulation show good agreement with the experimental values reported by Huang et al. [50].
All numerical simulations were performed over a one-hour period, starting from the previously described initial conditions.
- Experimentally validate the numerical simulation results through field testing in regions with climate conditions similar to Ouarzazate
- Develop mathematical models, software programs and simulations incorporating different types of PV panels and cooling strategies

The numerical study in the present paper has the aim of identifying through a numerical simulation method the basic characteristics of seal gas flowinduced vibrations along with an analysis of general laws governing such vibrations.
Numerical simulation of the influence of pressure ratio on seal gas flow-induced vibrations.
Numerical simulation of the influence of speed on the seal gas flow-induced vibrations.
Numerical simulation of the influence of inlet gas pre-rotation on the seal gas flow-induced vibrations.
Moore: CFD comparison to 3D laser anemometer and rotordynamic force measurements for grooved liquid annular seals.

Hussain et al. [1] explored a mathematical model simulation using CFD in COMSOL Multiphysics.
Tripathi et al. [14] provided a mathematical simulation to study the delivery of biomedical drugs in a two-dimensional laminar flow.
Sajid, Numerical simulation of pulsatile flow of blood in a porous-saturated overlapping stenosed artery, Math.
Gorla, Unsteady hybrid nanoparticle-mediated magneto-hemodynamics and heat transfer through an overlapped stenotic artery: Biomedical drug delivery simulation, Proc.

The first step in the simulation involved selecting the model wizard and model dimension to be investigated.
Sheikholeslami, Numerical simulation of magnetic nanofluid natural convection in porous media. 
Adegun, Computational fluid dynamics (CFD) analysis of buoyancy flow in a differentially heated square cavity,  IOP Conf.
Beg, Simulation of natural convection heat transfer in a 2-D trapezoidal enclosure, Int. 
Olaniyan, Numerical simulation of heat transfer and fluid flow around a cylinder of varying cross-section.