Comparison of finite element and finite volume methods for simulation of natural ventilation in greenhouses

Molina-Aiz, F.D.; Fatnassi, H.; Boulard, Thierry; Roy, J.C.; Valera, D.L.

doi:10.1016/j.compag.2010.03.002

Cited by 89 publications

(48 citation statements)

References 55 publications

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“…In studies of air flow, the experimental methods mostly used are scaled models and unidirectional anemometry; the tracer gas technique is used less often, as well as three-dimensional anemometry, which is considerably more expensive. Studies that have used new methods to assess ventilation systems, such as those by Lu (2009), Molina (2010), Endalew (2009), van Henten (2008, Mikulka (2010) and Defraeye (2010), have been increasing in the past three years. The main question is the validation of these studies because they mainly concern to real scale greenhouses, whereas the measurements and characterizations have merely been done on scale models.…”

Section: Main Results Of Cfd Models In Greenhousesmentioning

confidence: 99%

“…In a study by Molina et al (2010), on the effectiveness of the Finite Element Method (FEM) and Finite Volume Method (FVM) for two-dimensional incompressible turbulent flow in ventilation rates, it was found that the FEM requires twice the computation time and 10 times more memory storage than FVM. FVM software (ANSYS/FLUENT v 6.3.)…”

Section: Finite Element Vs Finite Volumementioning

confidence: 99%

See 1 more Smart Citation

Advances in Computational Fluid Dynamics Applied to the Greenhouse Environment

Flores-Velázquez¹,

Torre-Gea²,

Rico-García³

et al. 2012

Applied Computational Fluid Dynamics

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Section: Main Results Of Cfd Models In Greenhousesmentioning

confidence: 99%

Section: Finite Element Vs Finite Volumementioning

confidence: 99%

Advances in Computational Fluid Dynamics Applied to the Greenhouse Environment

Flores-Velázquez¹,

Torre-Gea²,

Rico-García³

et al. 2012

Applied Computational Fluid Dynamics

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“…Suhu tersebut cukup tinggi akibat adanya pengaruh radiasi matahari, yaitu sebesar i = 182 Wm -2 . Beberapa asumsi yang menjadi batasan dalam simulasi ini meliputi: 1) fenomena aliran pindah panas terjadi pada kondisi steady state, 2) tipe analisisnya eksternal, 3) sumber panas hanya berasal dari paparan radiasi matahari, 4) panas jenis, konduktifitas dan viskositas udara maupun air tetap konstan selama simulasi, 5) konduktifitas panas berupa isotropis, 6) fluida yang terlibat terdiri Boulard, Roy, & Valera, 2010). Secara umum, persamaan dasar dalam CFD terdiri dari hukum kekekalan massa, momentum dan energi (Boulard, Fatnassi, Majdoubi, & Bouirden, 2008;Sobachkin & Dumnov, 2013), dan pendekatan numerik untuk merepresentasikan prinsip kontinuitas massa dengan asumsi kondisi aliran yang steady dinyatakan dalam persamaan ReynoldAverage of the Navier-Stokes (Benjamin & Roberts, 2007;Della Torre, Montenegro, Tabor, & Wears, 2014;Halder & Datta, 2012) yang dituliskan dengan persamaan berikut:…”

Section: Simulasi Cfdunclassified

Simulation of Temperature Distribution on the Planting Hole of Floating Hydroponic for Shallot Production in Tropical Lowland

Niam

Suhardiyanto

Maddu

2017

JTEP

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Jurnal Keteknikan Pertanian (JTEP) terakreditasi berdasarkan SK Dirjen Penguatan Riset dan Pengembangan Kementerian Ristek Dikti Nomor I/E/KPT/2015 tanggal 21 September 2015. Selain itu, JTEP juga telah terdaftar pada Crossref dan telah memiliki Digital Object Identifier (DOI) dan telah terindeks pada ISJD, IPI, Google Scholar dan DOAJ. Mulai edisi ini redaksi memandang perlu untuk meningkatkan nomor penerbitan dari dua menjadi tiga kali setahun yaitu bulan April, Agustus dan Desember berisi 12 naskah untuk setiap nomornya. Hal ini dimaksudkan untuk mengurangi masa tunggu dengan tidak menurunkan kualitas naskah yang dipublikasikan. Jurnal berkala ilmiah ini berkiprah dalam pengembangan ilmu keteknikan untuk pertanian tropika dan lingkungan hayati. Jurnal ini diterbitkan dua kali setahun baik dalam edisi cetak maupun edisi online. Penulis makalah tidak dibatasi pada anggota PERTETA tetapi terbuka bagi masyarakat umum. Lingkup makalah, antara lain: teknik sumberdaya lahan dan air, alat dan mesin budidaya pertanian, lingkungan dan bangunan pertanian, energi alternatif dan elektrifikasi, ergonomika dan elektronika pertanian, teknik pengolahan pangan dan hasil pertanian, manajemen dan sistem informasi pertanian. Makalah dikelompokkan dalam invited paper yang menyajikan isu aktual nasional dan internasional, review perkembangan penelitian, atau penerapan ilmu dan teknologi, technical paper hasil penelitian, penerapan, atau diseminasi, serta research methodology berkaitan pengembangan modul, metode, prosedur, program aplikasi, dan lain sebagainya. Penulisan naskah harus mengikuti panduan penulisan seperti tercantum pada website dan naskah dikirim secara elektronik (online submission) melalui http://journal.ipb.ac.id/index.php/jtep. Penanggungjawab:Ketua AbstrakMakalah ini membahas tentang efek pendinginan daerah perakaran (root zone cooling) pada hidroponik rakit apung untuk produksi bawang merah di dataran rendah tropika dengan pendinginan pada bak nutrient. Penelitian dilakukan dengan 3 suhu berbeda, yaitu pada suhu rendah (8-10 O C), suhu sedang (13-15 O C), dan kontrol (23-26 O C) dengan variabel respon pertumbuhan tanaman bawang merah meliputi bobot basah, bobot kering, jumlah umbi dan bobot per umbi. Respon pertumbuhan tanaman dianalisis menggunakan metoda statistik Fisher's least significant difference (LSD), sedangkan distribusi suhu pada hidroponik rakit apung dianalisis melalui pendekatan simulasi computational fluid dynamics (CFD). Pendekatan simulasi CFD mampu menggambarkan sebaran suhu pada hidroponik rakit apung dengan baik dimana koefisien determinasi (R 2 ) untuk masing-masing perlakuan dari suhu rendah, sedang dan kontrol berturut-turut sebesar 0.983, 0.980 dan 0.862. Hasil penelitian menunjukkan bahwa jumlah umbi merupakan variabel yang paling responsif, dimana pada suhu rendah induksi pembentukan umbi bawang merah mencapai 200% lebih banyak dari pada suhu kontrol dan 60% lebih banyak dari suhu sedang.

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“…ANSYS is used for creating the volume mesh and the whole computational domain. Two simulation codes based on the finite element method (ANSYS/Mechanical) and the finite volume method (ANSYS/Fluent) were coupled to obtain numerical solutions for the integral equations which determine the airflow pressures, the wing eigenfrequencies, and its respective mode shapes [7,8]. Then, a numerical stochastic method of coupled fluid-structure model and reliability analysis based on the first and the second order reliability methods (FORM and SORM) is applied for analyzing the effect of uncertainties on the numerical results and to find the best compromise between cost and safety in order to supply guidelines for carrying out reliable and cost-effective projects, accounting for the statistical variability of the design parameters.…”

Section: Introductionmentioning

confidence: 99%

Vibratory Reliability Analysis of an Aircraft’s Wing via Fluid–Structure Interactions

Maani

Radi²,

Hami

2017

Aerospace

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Abstract:The numerical simulation of multiphysics problems has grown steadily in recent years. This development is due to both the permanent increase of IT resources and the considerable progress made in modeling, mathematical and numerical analysis of many problems in fluid and solid mechanics. The phenomena related to fluid/structure mechanical coupling occurs in many industrial situations, and the influence it may have on the dynamic behavior of mechanical systems is often significant. In this paper, a numerical vibratory study is conducted on a three-dimensional aircraft's wing subjected to aerodynamic loads. Finite volume method (FVM) is used for the discretization of the fluid problem, and finite element method (FEM) is used for the structure's approximation. In this context, a deterministic model has been proposed in our study, then stochastic analysis has been developed to deal with the statistical nature of fluid-structure interaction parameters. Moreover, probabilistic-based reliability analysis intends to find safe and cost-effective projects.

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Comparison of finite element and finite volume methods for simulation of natural ventilation in greenhouses

Cited by 89 publications

References 55 publications

Advances in Computational Fluid Dynamics Applied to the Greenhouse Environment

Advances in Computational Fluid Dynamics Applied to the Greenhouse Environment

Simulation of Temperature Distribution on the Planting Hole of Floating Hydroponic for Shallot Production in Tropical Lowland

Vibratory Reliability Analysis of an Aircraft’s Wing via Fluid–Structure Interactions

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