From 5c2b497a43c2c1cb67eea20a8b73ec358a82b933 Mon Sep 17 00:00:00 2001 From: Claude Date: Fri, 30 Oct 2026 14:47:43 +0000 Subject: [PATCH] =?UTF-8?q?docs:=20VIV=20predeclare=20=E2=80=94=20U*=20=3D?= =?UTF-8?q?=205.0,=20verified=20f=5FN=20convention,=20c=5Fcrit=20and=20tar?= =?UTF-8?q?get=20OPEN?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Co-Authored-By: Claude Opus 5.5 --- docs/validation/leontini_viv_predeclare.md | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/docs/validation/leontini_viv_predeclare.md b/docs/validation/leontini_viv_predeclare.md index 7186471..1a0102b 100644 --- a/docs/validation/leontini_viv_predeclare.md +++ b/docs/validation/leontini_viv_predeclare.md @@ -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, 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). -- OPEN: c_crit convention (in-fluid vs vacuum); the chosen figure panel; the - digitized A*/D and f/f_N at the chosen U* with tool and digitization - uncertainty. No target number is used before these are recorded. +- Verified (Grok, primary text, JFS §3.1): U* uses f_N in fluid "assuming an + inviscid added-mass term applies" (C_A = 1); the paper also plots f/f_N,vac. + 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) -- One U* inside the primary lock-in band, chosen from the paper's own figure - before any run (OPEN, with its digitized A*, f/f_N). +- U* = 5.0: the paper's own example of a periodic, constant-amplitude, + 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 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.