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Younglin's CFD Blog
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CFD Case Memory Estimator

Visualize total and per-partition memory budget from cell count, fields, matrix factor, and solver overhead.

visual calculatorNumerics & Stability

Read the flow shape before trusting the number.

This page turns a CFD setup into regime, scale, and dominant-effect cues. Adjust the calculator below and compare the moving graphic with the computed result.

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check
memoryHPCmesh sizeparallel CFD
formula
KaTeX rendered
memory ˜= cells * field_components * time_levels * 8 + matrix + overhead\begin{aligned}\text{memory \~{}= cells * field\_components * time\_levels * 8 + matrix + overhead}\end{aligned}
ASCII sourcememory ~= cells * field_components * time_levels * 8 + matrix + overhead
CFD memory budget16 GB128 GB512 GBlaptop scaletotal memory includes fields, sparse matrices, and solver overheadfieldsmatrixoverhead16 shown partitions; per-rank memory should fit node limits
total memory (GB)
7.4029
per-rank memory (GB)
0.4627
cells per rank
5.000e+5
stored components/cell
17
field memory (GB)
2.0266
matrix memory (GB)
2.0862
overhead memory (GB)
3.2902
hardware class
laptop scale

This is a sizing estimate, not a solver guarantee. Multigrid levels, chemistry tables, Lagrangian particles, and I/O buffers can increase memory substantially.

memoryHPCmesh sizeparallel CFD