# \#fluid-flow

**URL:** https://discourse.julialang.org/tag/fluid-flow/1485.md

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## [Stokes Operator is Singular After Applying Dirichlet Boundary Conditions](https://discourse.julialang.org/t/stokes-operator-is-singular-after-applying-dirichlet-boundary-conditions/135278)

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**Author:** [@noetheriankoala](https://discourse.julialang.org/u/noetheriankoala)\
**Replies:** 7\
**Last updated:** [January 27, 2026, 5:53pm UTC](https://discourse.julialang.org/t/stokes-operator-is-singular-after-applying-dirichlet-boundary-conditions/135278 "2026-01-27T17:53:11Z")

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Hello! I am trying to implement a simple incompressible Navier-Stokes simulation. I have a mesh consisting of a cylinder with the Stanford bunny excised from its center. When I apply Drichlet boundary conditions, the Sto…

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## [Solving differential equations for multi-component fluid flow](https://discourse.julialang.org/t/solving-differential-equations-for-multi-component-fluid-flow/116254)

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**Author:** [@DanaO](https://discourse.julialang.org/u/DanaO)\
**Replies:** 7\
**Last updated:** [July 4, 2024, 8:28am UTC](https://discourse.julialang.org/t/solving-differential-equations-for-multi-component-fluid-flow/116254 "2024-07-04T08:28:12Z")

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Hello everyone, I would like to model a multi-component, isothermal gas flow in a 1D pipeline. To do this, I would like to solve the following simplified differential equations: \\quad \\frac{\\partial p}{\\partial t} = -…

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## [Can ModelingToolkit be used for simulating fluid flow including fluid properties?](https://discourse.julialang.org/t/can-modelingtoolkit-be-used-for-simulating-fluid-flow-including-fluid-properties/107298)

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**Author:** [@NikoBiele](https://discourse.julialang.org/u/NikoBiele)\
**Replies:** 6\
**Last updated:** [December 12, 2023, 5:39pm UTC](https://discourse.julialang.org/t/can-modelingtoolkit-be-used-for-simulating-fluid-flow-including-fluid-properties/107298 "2023-12-12T17:39:56Z")

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Hi all, I am huge fan of Julia, and I used it for my Master’s thesis where I made a large dynamic model of a two-stage heat pump, including all of the fluid properties (via CoolProp.jl), such as: Temperature, pressure, …