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If you are not sure or not able to commit to a regular donation, but still want to help the project, you can do a one-time donation, of any amount.

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We call sponsoring the act of donating money recurrently to the FreeCAD project. You can do that as an individual or as a company or institution, through different channels or platforms, depending on your preferences.

Sponsoring FreeCAD allows its developers to count on a steady flow of income, so it allows the FPA to plan things ahead, and the FreeCAD developers to invest themselves more seriously into FreeCAD.

To encourage persons and companies to sponsor the FreeCAD project, we have created different sponsoring tiers. When donating regularly to the project, unless you prefer to stay anonymous, your name, company name and/or logo will be featured on this website, depending on the tier you fit into:

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🥇 Gold sponsor : from 200 USD / 200 EUR per month. Your name or company name and logo displayed on this page, with a link to your website and a custom description text. Companies that have helped FreeCAD early on also appear under Gold sponsors.

Instead of donating each month, you might find it more comfortable to make a one-time donation that, when divided by twelve, would give you right to enter a sponsoring tier. Don't hesitate to do so!

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GuiCommand:Container| {{GuiCommand Name: FEM ConstraintInitialFlowVelocity MenuLocation: Model , Fluid boundary conditions , Initial flow velocity condition Workbenches: FEM_Workbench SeeAlso: FEM_ConstraintFlowVelocity, FEM_ConstraintInitialPressure }} {{GuiCommandFemInfo Solvers: Elmer }}

FEM ConstraintInitialFlowVelocity

Description

Creates an initial flow velocity condition for a fluid flow analysis.

Usage

Press the Initial flow velocity condition button or select the menu Model → Fluid boundary conditions → Initial flow velocity condition.
Enter an initial flow velocity value for the analysis. The value is entered as a combination of the 3 main cartesian vectors components (X,Y,Z).
For a 3D analysis, select a \'solid\' (body) from your model, for a 2D analysis select a face. However, it is also possible to select a face (e.g. the inlet of a pipe) in 3D or an edge in 2D.

Formulas

For a description how to input formulas, see section Formulas in the page for the Flow velocity constraint.

Notes

In simple analyses, it is not necessary to specify the initial flow velocity, however it is recommended as best practice.

⏵ documentation index > FEM > FEM ConstraintInitialFlowVelocity

This page is retrieved from https://github.com/FreeCAD/FreeCAD-documentation/blob/main/wiki/FEM_ConstraintInitialFlowVelocity.md