increase the temperature, velocity solver iteration

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Aug 20, 2025, 6:24:33 AMAug 20

to Nek5000

Hi,

I wan to know how to increase the solver iteration in NEK5000.

Error Hmholtz TEMP 200

PRES gmres 8

Hmholtz VELX 3

Hmholtz VELY 3

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Aug 21, 2025, 10:01:30 AMAug 21

to Nek5000

Hi,

You can overwrite the value of nmxt inside usrdat2 like this

ifield = 2

nmxt(ifield-1) = 900

! nmxv, nmxp ! for velocity and pressure

For over 900, you will need to also change the upper cap, maxcg,

grep "maxcg=" Nek5000/core/*

hmholtz.f: parameter (maxcg=900)

Thope this help,

Yu-Hsiang

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