Frank14f/CelerisLab
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

docs: VIV predeclare — U* = 5.0, verified f_N convention, c_crit and target OPEN

Browse Source 
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Claude
2026-10-30 14:47:43 +00:00
co-authored by Claude Opus 5.5
parent 731629f5a3
commit 5c2b497a43
1 changed files with 14 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/validation/leontini_viv_predeclare.md
+14 -5
View File
@@ -11,14 +11,23 @@ record; nothing here re-scores it. No code until this page is agreed.
doi:10.1016/j.jfluidstructs.2006.04.003. 2-D, one transverse DOF, doi:10.1016/j.jfluidstructs.2006.04.003. 2-D, one transverse DOF,
Re = 200, m* = m/m_f = 10, zeta = 0.01; U* = U/(f_N D), f_N natural frequency Re = 200, m* = m/m_f = 10, zeta = 0.01; U* = U/(f_N D), f_N natural frequency
in fluid with inviscid added mass (as read by Grok from the full text). in fluid with inviscid added mass (as read by Grok from the full text).
- OPEN: c_crit convention (in-fluid vs vacuum); the chosen figure panel; the - Verified (Grok, primary text, JFS §3.1): U* uses f_N in fluid "assuming an
digitized A*/D and f/f_N at the chosen U* with tool and digitization inviscid added-mass term applies" (C_A = 1); the paper also plots f/f_N,vac.
uncertainty. No target number is used before these are recorded. Companion: ANZIAM J. 46(E) C365–C378 (2005), doi:10.21914/anziamj.v46i0.965.
- c_crit: both papers write zeta = c/c_crit without defining c_crit. OPEN for
the owners: (a) structural 2 sqrt(k m) or (b) effective 2 sqrt(k (m + m_A)).
The difference in c is sqrt(11/10) ≈ 5 % at m* = 10; the choice is declared
before any run and the other is not substituted afterwards.
- Target: digitized A*/D and f/f_N at U* = 5.0 from Fig. 1 (tool and
digitization uncertainty recorded). OPEN until that digitization exists; no
target number is used before it.
## Case (one locked point; a sweep is a separate decision) ## Case (one locked point; a sweep is a separate decision)
- One U* inside the primary lock-in band, chosen from the paper's own figure - U* = 5.0: the paper's own example of a periodic, constant-amplitude,
before any run (OPEN, with its digitized A*, f/f_N). stable-phase response (Fig. 3); avoids the intermittent upper-type range
U* in (4.2, 4.7) (Fig. 2 at U* = 4.6, transition near 4.7). Chosen from the
paper's prose before any run.
- D = 40 (matches the prescribed stage), MRT, dense double buffer, native - D = 40 (matches the prescribed stage), MRT, dense double buffer, native
channel: uniform inlet U_lat = .04, NEQ outlet, slip y walls; box 40 D × 20 D channel: uniform inlet U_lat = .04, NEQ outlet, slip y walls; box 40 D × 20 D
(blockage .05), cylinder 10 D from the inlet — a reproduction choice. (blockage .05), cylinder 10 D from the inlet — a reproduction choice.