Rejected from Physics of Fluids? Where to Submit Next

Use these as routing checks, not as automatic resubmission reasons.

Verify the current Physics of Fluids editorial-team page before quoting any editor name in a response letter or author note.

This page was researched from the current AIP Author Instructions for Physics of Fluids, the Physics of Fluids journal page, the AIP Physics of Fluids portfolio page, the Peer X-Press submission portal, and adjacent official source checks for Journal of Fluid Mechanics, Physical Review Fluids, International Journal of Heat and Fluid Flow, International Journal of Heat and Mass Transfer, International Communications in Heat and Mass Transfer, Applied Thermal Engineering, Applied Energy, Energy, Energy Conversion and Management, Journal of Energy Storage, and Fuel.

The non-obvious layer is package-and-format diagnosis. A rejected Physics of Fluids manuscript may still be a Physics of Fluids paper if the problem was a cover-letter violation, Letter formatting, response-letter weakness, missing validation, or unclear fluid-mechanism framing. It may be a Journal of Fluid Mechanics paper if the work needs deeper canonical mechanics exposition. It may be a Physical Review Fluids paper if the physics-first result is concise and PR-style. It may be IJHFF or IJHMT if coupled flow/heat-transfer or transfer-process evidence owns the contribution. It may be Applied Thermal Engineering, Applied Energy, Energy, ECM, Journal of Energy Storage, Fuel, or a specialist venue if the application, system consequence, storage behavior, combustion behavior, or engineering implementation is the real claim.

In our diagnostic review work, the repeated failure pattern is simple: authors treat Physics of Fluids rejection as a prestige problem when the cleaner diagnosis is usually package mechanics, article shape, evidence spine, or audience center. That is why this page starts with the submission package and only then moves to journal alternatives.

Do not assume a rejection means the paper is too weak. Sometimes the manuscript is strong but submitted with the wrong package, wrong article type, or wrong reader promise.

Use these labels to convert the rejection into a repair plan.

No-cover-letter package failure: the submission included a cover letter even though Physics of Fluids currently says cover letters are not accepted. If this was the return reason, do not rewrite the science first. Fix the submission package and confirm whether a response letter is required for a revised or previously declined manuscript.

Letter-format failure: the manuscript was treated as a Letter but does not satisfy the seven-page, 100-word abstract, no-heading, condensed-communication logic. The fix may be a regular Physics of Fluids article, a Physical Review Fluids route, or a different venue, not just shorter prose.

Fluid-physics gap: the manuscript measures a flow quantity, shows a simulation, or presents an experiment but does not explain the fluid-dynamics mechanism. Physics of Fluids needs the flow physics to be the contribution, not just the background.

Verification gap: the numerical, CFD, DNS, AI/ML, or experimental package lacks grid-convergence evidence, benchmark comparison, uncertainty, repeatability, validation range, or sensitivity analysis. This rejection reason travels to every credible destination.

Audience-center gap: the manuscript is technically sound but belongs to Journal of Fluid Mechanics, Physical Review Fluids, International Journal of Heat and Fluid Flow, IJHMT, ICHMT, Applied Thermal Engineering, Applied Energy, Energy, ECM, Journal of Energy Storage, Fuel, or a specialist venue rather than Physics of Fluids.

These labels prevent cosmetic resubmission. A no-cover-letter failure is not fixed by a new journal. A Letter-format failure is not fixed by deleting discussion. A validation gap is not fixed by moving to an applied journal. A fluid-physics gap is not fixed by adding more plots.

The right next venue is the one where the strongest evidence becomes easier for reviewers to value.

Rebuild for Physics of Fluids when the manuscript still makes a genuine fluid-physics contribution and the rejection reason is repairable. This is most likely when the problem is a package violation, weak response letter, compressed Letter format, unclear title, weak abstract, missing benchmark table, or insufficient verification that can realistically be fixed.

Route back toward Physics of Fluids if:

• the main novelty is a fluid-dynamics mechanism, instability, turbulence behavior, multiphase phenomenon, rheological effect, interfacial process, vortex structure, or flow-regime explanation
• the first figure can be rebuilt to show the mechanism rather than just the application
• numerical work can add grid convergence, validation, benchmark, and sensitivity evidence
• experimental work can add uncertainty, calibration, repeatability, and operating-window evidence
• a resubmission response letter can directly address editor and reviewer concerns

Do not rebuild for Physics of Fluids if the paper's strongest claim is an energy-system decision, a thermal device, a heat-transfer correlation, a storage result, a fuel-conversion result, or an application performance comparison with only secondary fluid insight.

Journal of Fluid Mechanics is cleaner when the manuscript needs a deeper mechanics argument. Use this route when the paper's contribution is a field-level fluid-mechanics result and the manuscript can support a rigorous theoretical, computational, or experimental story. JFM is not a fallback for a thin Physics of Fluids rejection; it usually raises the bar on mechanism and exposition.

Physical Review Fluids is cleaner when the result is physics-first, compact, and suited to a PR-style paper or Letter-like communication. The route can work for a concise mechanism result, but it still requires clarity, validation, and a reason the finding matters to fluid physics rather than one applied device.

Route toward JFM or Physical Review Fluids when:

• the manuscript's core claim can be stated as a fluid-mechanics principle or mechanism
• the title and abstract can remove application padding without losing the contribution
• the benchmark literature is fluid-mechanics literature, not thermal-engineering or energy-systems literature
• the figures show mechanism, scaling, regime behavior, or physical explanation

Do not use these routes if the real reader is trying to design a heat exchanger, optimize a battery thermal system, estimate energy savings, reduce emissions, or compare engineering operating conditions.

International Journal of Heat and Fluid Flow is a strong route when flow and heat-transfer interaction owns the manuscript. Use it when turbulence, convection, thermal boundary layers, thermo-fluid mechanisms, or coupled flow/heat-transfer behavior are central.

International Journal of Heat and Mass Transfer is cleaner when heat or mass transfer is the real contribution and the paper needs full-length methods, validation, uncertainty, benchmarks, and mechanism discussion. If the rejected Physics of Fluids manuscript is actually a transfer-process paper, IJHMT can make the strongest evidence more central.

International Communications in Heat and Mass Transfer is cleaner when the result is compact, high-impact, and communication-shaped. Use the ICHMT rejection routing guide if you need to decide whether the paper is communication-shaped or full-length.

Do not move to a thermal journal just because a flow paper was rejected. Move only if the heat, mass, or coupled thermo-fluid mechanism is the reason reviewers should care.

Applied Thermal Engineering is stronger when the manuscript answers an engineering question about a component, device, equipment item, process, cooling architecture, heat exchanger, HVAC system, refrigeration cycle, electronics cooling design, or thermal-management implementation.

Applied Energy is stronger when the manuscript answers a deployment or decision question: operation, optimization, economics, lifecycle analysis, storage dispatch, building energy, net-zero planning, or multi-energy-system design.

Energy and Energy Conversion and Management are better when the central contribution is broad energy engineering, conversion, exergy, cost, management, or system-level performance.

Journal of Energy Storage is better when storage behavior, degradation, safety, thermal management, phase-change operation, battery behavior, or sizing owns the evidence. Fuel is better when combustion, emissions, fuel conversion, burner behavior, engine performance, or fuel-cell operation owns the evidence.

The common mistake is hiding an applied paper inside fluid-mechanics language. If the reviewers need device, cost, storage, fuel, or system expertise to judge the result, choose that audience.

In our review of fluid-dynamics manuscripts, the worst retargeting mistakes happen when authors treat Physics of Fluids as one interchangeable fluids journal. The journal's package rules, Letter format, and fluid-physics center make the diagnosis more specific.

Physics of Fluids no-cover-letter package pattern: the manuscript was returned because the initial submission included a cover letter. In that case, the abstract, first figure, methods, benchmark table, and fluid-physics claim may not be the problem. The first repair is the submission package. If the manuscript is a resubmission or revision, the required response letter should explain how editor and reviewer feedback was addressed.

Physics of Fluids Letter-format pattern: the manuscript was submitted or framed as a Letter, but the seven-page, 100-word abstract, no-heading, time-sensitive-result format made the work look compressed, incomplete, or unclear. The route may be a regular Physics of Fluids article, Physical Review Fluids, JFM, or a thermal/energy venue depending on the title, figures, methods depth, and mechanism claim.

Physics of Fluids fluid-mechanism pattern: the manuscript has flow visualizations, simulations, or experiments, but the title, abstract, first figure, and discussion do not identify the fluid-dynamics mechanism. A vortex image, velocity field, pressure contour, or machine-learning prediction is not enough unless the paper explains what new fluid physics reviewers should learn.

Physics of Fluids verification pattern: the manuscript depends on CFD, DNS, LES, experiments, reduced-order modeling, or physics-informed AI, but the methods section lacks grid-convergence, benchmark, uncertainty, validation-range, sensitivity, or repeatability evidence. This rejection reason travels to JFM, Physical Review Fluids, IJHFF, IJHMT, Applied Thermal Engineering, Applied Energy, Energy, ECM, storage, and fuel journals.

This is why a useful post-rejection decision starts with the rejection reason, not with a ranked list of journals. The next venue should make the strongest evidence in the paper more central.

If you want a second read before choosing the next route, run a journal-fit and evidence-strength check. The useful question is not "where can I send this fast?" It is "which audience will evaluate the actual contribution?"

Maybe, but treat resubmission as a high bar. AIP's instructions say resubmissions, or an initial submission previously declined, require a response letter summarizing how editor and reviewer feedback was addressed.

Consider resubmission only if:

• the editor invited it or the rejection reason is narrow and repairable
• any no-cover-letter package error has been fixed
• the manuscript still centers a fluid-physics contribution
• the article type is now correct: regular article, Letter, Comment, Response, or another appropriate route
• the title and abstract name the fluid-dynamics mechanism clearly
• numerical work now includes grid convergence, benchmark, validation, and sensitivity evidence
• experimental work now includes calibration, repeatability, uncertainty, and operating-window evidence
• the first figure explains the mechanism rather than only showing an application
• the response letter directly addresses every editor and reviewer concern

Do not resubmit if the paper's actual contribution is heat-transfer correlation, device engineering, energy optimization, storage performance, fuel conversion, or a specialist application without a strong fluid-physics advance.