A computational uid dynamics and heat transfer analysis is performed to determine the convection and radiation heat transfer from an impinging ame jet to a plane surface. This paper focuses on analyzing the behavior of an impinging ame jet, including buoyancy e ects, turbulence in uence, and convective and radiative heat transfer processes. The combustion is modeled using a 12-species probabili...

Jet nozzle is a core component of the hydraulic perforating fracturing tool, and design structure directly affects effectiveness efficiency. In this paper, flow field characteristics nozzles are calculated by SST k- ω turbulence model. The results show that parameters significantly influence jet performance. Through orthogonal experiments, conical-cylindrical geometric preliminarily optimized a...

This paper presents a computational study of the flow around DTMB 5415 at \(10^\circ \) static drift. Two RANS (Reynolds Averaged Navier-Stokes) turbulence models, as isotropic k-\(\omega SST and non linear anisotropic EARSM (Explicit Algebraic Reynolds Stress Model) one hybrid RANS-LES model, DES (Detached Eddy Simulation) based on \), are used with solver ISIS-CFD. All numerical results compa...

For analyzing the flow field and topological structure of hemispherical parachute in low angles of attack, a fluid-structure interaction (FSI) simulation technique is established to decide the shape of the hemispherical parachute during terminal descent. In the fluid simulation, the semi-implicit method for pressure-linked equations consistent (SIMPLEC) algorithm is introduced to solve shear st...

the steger and warming flux vector splitting implicit scheme is used to numerically solve two dimensional reynolds averaged navier–stokes (rans) equations governing the vortex induced vibration of a flexible riser laterally supported by a spring and a damper. the k–ε model is used as turbulence model to simulate the turbulent flow in the wake of the riser. to update the new position of the rise...

Wind flow on and around buildings attains more importance among architectures, builders, urban planners, structural engineers, wind engineers. tunnel experiments assessments of full-scale are expensive complex in varied terrain conditions. Hence, flows extensively assessed using Computational Fluid Dynamics (CFD). By following the turbulence parameters, CFD models create atmospheric environment...

The primary objective of this study is to evaluate the accuracy of using computational fluid dynamics (CFD) turbulence models to predict entropy generation rates in bypass transitional boundary layers flows under zero and adverse pressure gradients. Entropy generation rates in such flows are evaluated employing the commercial CFD software, ANSYS FLUENT. Various turbulence and transitional model...

One of the newest of viscoelastic RANS turbulence models for drag reducing channel flow with polymer additives is studied in different flow and rheological properties. In this model, finitely extensible nonlinear elastic-Peterlin (FENE-P) constitutive model is used to describe the viscoelastic effect of polymer solution and turbulence model is developed in the k-ϵ-(ν^2 ) ̅-f framework. The geome...

The main purpose of this work is to simulate the flow air and solid particles over a wildfire investigate single multiphase surface custom-designed wing with an Eppler-420 airfoil including appendant blended winglet. result conceptual preliminary design small-scale unmanned aerial vehicle (UAV) designed assist in firefighting. fire embers will be simulated Ansys Fluent commercial code as inject...

Using experimental models along with conducting numerical analysis have been widely used in performance recognition and optimization of hydraulic equipments. Numerical modeling has lower cost rather than experimental one; however practical tests are commonly used because of the hydraulic structure importance especially in dams. Meanwhile numerical methods could be used for future designs throug...