計(jì)算機(jī)和流體是多學(xué)科的。“流體”一詞的解釋最廣泛。只要計(jì)算機(jī)技術(shù)在相關(guān)研究或設(shè)計(jì)方法中起著重要作用，那么水動(dòng)力學(xué)和空氣動(dòng)力學(xué)、高速和物理氣體動(dòng)力學(xué)、湍流和流動(dòng)穩(wěn)定性、多相流、流變學(xué)、摩擦學(xué)和流體結(jié)構(gòu)相互作用都是重要的。在大多數(shù)工程和科學(xué)領(lǐng)域都有應(yīng)用：機(jī)械、民用、化學(xué)、航空、醫(yī)學(xué)、地球物理、核和海洋學(xué)。這些問(wèn)題包括空氣、海洋和陸地車(chē)輛運(yùn)動(dòng)和流動(dòng)物理、能量轉(zhuǎn)換和動(dòng)力、化學(xué)反應(yīng)器和運(yùn)輸過(guò)程、海洋和大氣效應(yīng)和污染、生物醫(yī)學(xué)、噪音和聲學(xué)以及磁流體動(dòng)力學(xué)等。與流體流動(dòng)計(jì)算有關(guān)的數(shù)值方法的發(fā)展、流動(dòng)物理和流體相互作用的計(jì)算分析以及對(duì)流動(dòng)系統(tǒng)和設(shè)計(jì)的新應(yīng)用都與計(jì)算機(jī)和流體有關(guān)。基準(zhǔn)解決方案也在期刊的范圍內(nèi)，將在專(zhuān)門(mén)的期刊上發(fā)表。關(guān)于驗(yàn)證和數(shù)字準(zhǔn)確性的政策聲明：計(jì)算機(jī)和流體將拒絕所有未按要求的準(zhǔn)確性評(píng)估報(bào)告結(jié)果的手稿。以下項(xiàng)目應(yīng)得到充分的數(shù)據(jù)和/或參考資料的討論和支持：物理模型和流量配置說(shuō)明：控制方程、邊界條件和幾何結(jié)構(gòu)以及控制無(wú)量綱數(shù)（雷諾數(shù)、馬赫數(shù)……）都應(yīng)以讀者可以重現(xiàn)結(jié)果的方式清楚說(shuō)明。數(shù)值方法說(shuō)明：應(yīng)明確描述，包括邊界條件和初始條件。應(yīng)給出準(zhǔn)確度的正式順序。對(duì)于空間平滑解，方法應(yīng)至少具有二階空間精確性，局部一階精確方法適用于具有不連續(xù)性（例如沖擊）的流動(dòng)。代碼驗(yàn)證活動(dòng)說(shuō)明：應(yīng)驗(yàn)證數(shù)值方案和算法的數(shù)值實(shí)現(xiàn)，例如使用分析解決方案、制造解決方案或高精度基準(zhǔn)解決方案。所提出的結(jié)果在空間、時(shí)間和迭代上的收斂性應(yīng)在手稿中得到解決。必須證明網(wǎng)格收斂性，考慮到應(yīng)評(píng)估與自由度數(shù)有關(guān)的若干計(jì)算收斂性。對(duì)于繪制殘差演化的穩(wěn)態(tài)結(jié)果，應(yīng)證明迭代收斂性。考慮到時(shí)間步長(zhǎng)的若干值，應(yīng)證明時(shí)間收斂性。基準(zhǔn)解決方案和專(zhuān)用特殊問(wèn)題：基準(zhǔn)解是計(jì)算流體力學(xué)（CFD）中評(píng)估新數(shù)值方法精度和驗(yàn)證實(shí)際應(yīng)用的重要工具。由于基準(zhǔn)解決方案沒(méi)有對(duì)流動(dòng)物理帶來(lái)新的見(jiàn)解，也沒(méi)有對(duì)應(yīng)于新的數(shù)值方法的呈現(xiàn)，因此它們將在專(zhuān)門(mén)的專(zhuān)刊上發(fā)表。作者應(yīng)該充分地提交它們。重要的是，提出基準(zhǔn)解決方案的文章應(yīng)滿(mǎn)足以下所有強(qiáng)制性要求：文章必須由至少兩個(gè)不同機(jī)構(gòu)的作者提交。應(yīng)詳細(xì)說(shuō)明流量配置，并用通常的無(wú)量綱參數(shù)（雷諾數(shù)、馬赫數(shù)、迎角等）進(jìn)行參數(shù)化。本文應(yīng)給出與至少一個(gè)配置參數(shù)（雷諾數(shù)、馬赫數(shù)等）的參數(shù)探索相關(guān)的結(jié)果。所選的變化范圍應(yīng)至少包括流動(dòng)拓?fù)浠蛄鲃?dòng)動(dòng)力學(xué)中的一個(gè)分叉（例如流動(dòng)分離的外觀、附加特征頻率的上升…）和控制參數(shù)的相關(guān)臨界值必須仔細(xì)確定。強(qiáng)調(diào)新提出的基準(zhǔn)解決方案應(yīng)顯著提高對(duì)數(shù)值方法能力的信心。因此，對(duì)于已經(jīng)存在的文本案例的簡(jiǎn)單變化將不被接受。應(yīng)至少使用三種不同的數(shù)值方法，并在所有圖表上進(jìn)行比較。商業(yè)CFD工具和廣泛使用的開(kāi)源解算器中可用的數(shù)值選項(xiàng)的簡(jiǎn)單比較將不被接受。如果手稿中的某些測(cè)試案例已經(jīng)存在一些結(jié)果，則應(yīng)給出相關(guān)的詳盡參考列表，并使用相關(guān)數(shù)據(jù)進(jìn)行比較。基準(zhǔn)解決方案應(yīng)不存在任何物理建模不確定性。因此，不應(yīng)使用湍流模型或其他半經(jīng)驗(yàn)物理模型。應(yīng)至少考慮四個(gè)分辨率級(jí)別來(lái)評(píng)估網(wǎng)格收斂性。對(duì)于無(wú)網(wǎng)格和隨機(jī)的方法，應(yīng)該提出四個(gè)自由度的精化級(jí)別。手稿應(yīng)向讀者提供顯示相關(guān)和有用物理量與（i）網(wǎng)格分辨率/自由度數(shù)和（i i）選定變化范圍內(nèi)的流量參數(shù)值的表格和圖表。強(qiáng)烈建議作者以文本格式提供完整的數(shù)據(jù)集，作為補(bǔ)充材料。作者可以自由提出基準(zhǔn)解決方案。如果提交的幾篇論文在審查中涉及非常接近的測(cè)試案例，作者將被要求集中在一組測(cè)試案例上，并重新提交一篇普通的論文。

Computers & Fluids is multidisciplinary. The term 'fluid' is interpreted in the broadest sense. Hydro- and aerodynamics, high-speed and physical gas dynamics, turbulence and flow stability, multiphase flow, rheology, tribology and fluid-structure interaction are all of interest, provided that computer technique plays a significant role in the associated studies or design methodology.Applications will be found in most branches of engineering and science: mechanical, civil, chemical, aeronautical, medical, geophysical, nuclear and oceanographic. These will involve problems of air, sea and land vehicle motion and flow physics, energy conversion and power, chemical reactors and transport processes, ocean and atmospheric effects and pollution, biomedicine, noise and acoustics, and magnetohydrodynamics amongst others.The development of numerical methods relevant to fluid flow computations, computational analysis of flow physics and fluid interactions and novel applications to flow systems and to design are pertinent to Computers & Fluids. Benchmark solutions are also within the scope of the journal and will be published in dedicated issues.Policy statement on validation and numerical accuracy:Computers & Fluids will reject all manuscripts that do not report results with the required assessment of accuracy. The following items should be discussed and supported by adequate data and/or references:Statement of the physical model and flow configuration: both the governing equations, boundary conditions and geometry and governing dimensionless numbers (Reynolds number, Mach number...) should be clearly explicated in such a way that readers may reproduce the results.Statement of numerical methods: they should be described in a clear way, including boundary conditions and initial conditions. Formal order of accuracy should be given. Methods should be at least second-order accurate in space for spatially smooth solutions, locally first-order accurate methods being appropriate for flows with discontinuities (e.g. shocks).Statement of code verification activities: numerical implementation of the numerical schemes and algorithms should have been verified, e.g. using analytical solutions, manufactured solutions or highly accurate benchmark solutions.Spatial, temporal and iterative convergence of the presented results should be asessed in the manuscript. Grid convergence must be proved considering several computational convergence with respect to the number of degrees of freedom should be assessed. Iterative convergence should be proved for steady-state results plotting residual evolution. Temporal convergence should be proved considering several values of the time step.Benchmark solutions and dedicated speical issues:Benchmark solutions are important tools in CFD to assess the accuracy of new numerical method and to validate practical implementation. Since benchmark solutions do not bring new insight into flow physics and they do not correspond to presentation of a new numerical method, they will be published in dedicated special issues. Authors should submit them adequately. It is important noting that articles presenting a benchmark solution should fulfill all following mandatory requirements:Article must be submitted by authors from at least two different institutions.The flow configuration should be exhaustively detailed and parameterized by usual dimensionless parameters (Reynolds number, Mach number, angle of attack...). The paper should present results associated to a parametric exploration of at least one configuration parameter (Reynolds, Mach...). The selected range(s) of variation should encompass at lest one bifurcation in flow topology or flow dynamics (e.g. appearance of flow separation, rise of additional characteristic frequencies...) and the associated critical value(s) of the governing parameter(s) must be carefully determined. It is emphasized that new proposed benchmark solutions should significantly increase the confidence into numerical methods capabilities. Therefore, simple variations about already existing text cases will not be accepted.At least three different numerical methods should be used and compared on all figures/tables. Simple comparisons of numerical options available in commercial CFD tools and widely used open source solvers will not be accepted.In the case some results already exist for some test cases presented in the manuscript, a related exhaustive reference list should be given and associated data used for comparision.The benchmark solutions should be free of any physical modelling uncertainty. Therefore, turbulence model or other semi-empirical physical models should not be used.Grid convergence should be assessed considering at least four resolution levels. For gridless and stohastic methods, four refinement levels in terms of number of degrees of freedom should be presented.The manuscript should provide the reader with tables and plots displaying values of relevant and useful physical quantities versus (i) grid resolution/number of degrees of freedom and (ii) flow parameters in the selected range of variation. Authors are also strongly encouraged to provide full data set in text format that will be made available as supplementary materials.Authors are free to propose benchmark solutions. In the case several submitted papers under review deal with the very close test cases, authors will be asked to converge on a set of test cases and to re-submit a common paper.