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We have by now fully set up the simulation project.
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Alternatively, a poor set of initial conditions may yield no converging solution at all. like the rocket engine not yet ignited), however, this may not always be the case. In this case ambient static condition would work fine, because by physical reasoning, given the boundary conditions we will specify later (a supply pressure and a back pressure), the flow will develop into the supersonic jet even if it start from ambient (i.e. It should be noted that, however, that it is possible for a different solution to develop from the desired one if the initial conditions are not set up properly. If we are continuing a previous calculation, previous results may be made use of, and SOLIDWORKS Flow Simulation makes such automatic provision, as we shall see in the solving process. This will be illustrated in the next part of this article. If we can already anticipate the final solution to some extent, either by analytical reasoning or by previous CFD calculations, we can modify this initial condition for the solver to converge faster. The initial conditions are set to ambient for the solver to start. These parameters are irrelevant to some extent to this simulation. We define the wall to be adiabatic and with some roughness.
HOW TO ADD SOLIDWORKS FLOW SIMULATION MANUAL
Note that if this is not checked, the solver will work with a warning saying supersonic flow is detected and manual stop condition is recommended. We specify the flow to be of high Mach Number because we are expecting such a solution. In this case we add air from the library of pre-defined fluids. However, these can be conveniently set up if the scenario deems it necessary. In this choked nozzle analysis we are concerned with none of these (we ignore the effect of heat transfer, look for a steady state solution, and the effect of gravity can be neglected since we are concerned with the flow of air under high Mach Numbers, etc.). There are physical features to be considered in each analysis project. We use internal analysis in this simulation because the flow within the choked nozzle tube is to be studied. As illustrated perfectly in the wizard, there are two types of analysis supported in SOLIDWORKS flow simulation, namely internal analysis, and external analysis.
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The wizard is to be used in this project. The Wizard is a user-friendly interface provided to guide the user through the set-up phase of the simulation project. Click on this icon to turn on the flow simulation add-in. We first turn on the flow simulation add-in. Infinitely thin sections, small gaps left in the model (particularly sheet metal model), may contribute to such problems. Therefore, the model has to be adjusted slightly. This led to singularities in the solution and the Mach Number burst to over 200, which can be clearly identified as incorrect by those with knowledge of the boundary conditions and some fluid mechanics. In this case, I have attempted a 35mm chamfer on a step of 35mm, and the resultant feature does not contain an edge that SOLIDWORKS would recognise as a human being. The flow motion study can be set up after the solid model is complete, however, it should be noted that you may need to modify the model slightly should problems be encountered during the solving process. It also has long sections of uniform channel to uniform the flow. This model features a choked nozzle section with inlet from the left and exhaust to the right. Model of the choked nozzle tube, in sectional view My model is based on the method of “ modelling in accordance with manufacture“, and it can be downloaded here. We must first model a choked nozzle in SOLIDWORKS. This is insufficient to produce results of meaningful accuracy, but helps to control the solving time down to the order of several minutes. The entire model contains just above 5000 cells with over 3000 contacting the wall. It should be noted that, since this project is for experimental purpose, the meshing is automatic and very coarse. This is part 1 of the post, and this post is dedicated to the construction of the simulation project, including modelling, setting-up the wizard, and adding boundary conditions and goals. This post illustrates a test project using the Flow Simulation add-in, showing its basic operational procedures and analysis capabilities. This add-in is straightforward to use, as this article would intend to show. It offers the basic CFD functions within SOLIDWORKS i.e.
HOW TO ADD SOLIDWORKS FLOW SIMULATION SOFTWARE
The SOLIDWORKS Flow Simulation is an add-in to the famous middle-of-the-way 3D modelling software package SOLIDWORKS.