# IMEX scheme using DifferentialEquations.jl

**URL:** https://discourse.julialang.org/t/imex-scheme-using-differentialequations-jl/41435
**Category:** General Usage
**Created:** [June 15, 2020, 11:14am UTC](https://discourse.julialang.org/t/imex-scheme-using-differentialequations-jl/41435 "2020-06-15T11:14:18Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![Hgs](https://avatars.discourse-cdn.com/v4/letter/h/e5b9ba/32.png) [@Hgs](https://discourse.julialang.org/u/Hgs)
#### Post date: [June 15, 2020, 11:14am UTC](https://discourse.julialang.org/t/imex-scheme-using-differentialequations-jl/41435/1 "2020-06-15T11:14:18Z")

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Hello,  
I have a PDE model which contains a stiff viscous term and non-stiff nonlinear convection term. I was wondering if I can exploit the pre-developed solvers in [DifferentialEquations.jl](https://docs.sciml.ai/stable/solvers/ode_solve/#ode_solve-1) to solve the pde (or system of odes after FD discretization) after splitting the problem to 2 part as follows:

> du/dt=f(u)+g(u)

I want to solve f(u) with an explicit solver and g(u) with an implicit one. Is that possible, or I should write the integration algorithm myself?

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### Author: ![Eben60](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/eben60/32/13475_2.png) [@Eben60](https://discourse.julialang.org/u/Eben60)
#### Post date: [June 15, 2020, 11:48am UTC](https://discourse.julialang.org/t/imex-scheme-using-differentialequations-jl/41435/2 "2020-06-15T11:48:30Z")

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[https://docs.sciml.ai/stable/solvers/split\_ode\_solve/](https://docs.sciml.ai/stable/solvers/split_ode_solve/) ?

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### Author: ![Raed\_Maraabeh](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/raed_maraabeh/32/36623_2.png) [@Raed\_Maraabeh](https://discourse.julialang.org/u/Raed_Maraabeh)
#### Post date: [May 28, 2022, 10:02pm UTC](https://discourse.julialang.org/t/imex-scheme-using-differentialequations-jl/41435/3 "2022-05-28T22:02:42Z")

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The link is not working, cm you post active one please?  
Thanks

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### Author: ![ChrisRackauckas](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/chrisrackauckas/32/77_2.png) [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)
#### Post date: [May 28, 2022, 10:05pm UTC](https://discourse.julialang.org/t/imex-scheme-using-differentialequations-jl/41435/4 "2022-05-28T22:05:27Z")

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> [@Raed\_Maraabeh](#):
>
> The link is not working, cm you post active one please?

[https://diffeq.sciml.ai/stable/types/split\_ode\_types/](https://diffeq.sciml.ai/stable/types/split_ode_types/)

[https://diffeq.sciml.ai/stable/solvers/split\_ode\_solve/](https://diffeq.sciml.ai/stable/solvers/split_ode_solve/)

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### Author: ![Raed\_Maraabeh](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/raed_maraabeh/32/36623_2.png) [@Raed\_Maraabeh](https://discourse.julialang.org/u/Raed_Maraabeh)
#### Post date: [June 3, 2022, 7:52pm UTC](https://discourse.julialang.org/t/imex-scheme-using-differentialequations-jl/41435/5 "2022-06-03T19:52:41Z")

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Thanks