Modelling the Velocity Field in a Regular Grid in the Area of Poland on the Basis of the Velocities of European Permanent Stations

Aim. To consider soil continuality and discreteness as features of heterogeneity manifestation in a soil cover, important for construction of agriculture systems. Methods. Geostatistical research of soil spatial heterogeneity, revealing the contours of a fi eld with various parameters of fertility. Results. The use of principles of precise agriculture and inspection of indicative properties of fi eld soils using a regular grid allowed to divide a fi eld into contours with three levels of fertility: the fi rst one is characterized by optimal or close to optimum properties which allows refusing from (or reducing substantially) tillage, introduction of fertilizers or chemical ameliorates; the second one has average parameters of fertility corresponding to zonal soils and demands the application of zonal technologies; the third one (with the worst parameters of fertility) presupposes regular use of the improved technologies. Conclusions. The introduction of precise agriculture will allow replacing a traditional zonal system with thenew which is soil-protecting and resource-saving one.

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The Influence of the Electric Field on the Development of the Swirling Flame Velocity Field and Combustion Characteristics

Heat Transfer Research ◽

10.1615/heattransres.v39.i5.10 ◽

2008 ◽

Vol 39 (5) ◽

pp. 371-378

Author(s):

Maija Zake ◽

Inesa Barmina ◽

Aleksandrs Desnickis

Keyword(s):

Velocity Field ◽

Electric Field ◽

Combustion Characteristics ◽

Flame Velocity ◽

Swirling Flame

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Velocity Field Bimodality in an Axisymmetric Diffusion Flame Combustor

10.1615/ihtc12.5090 ◽

2002 ◽

Author(s):

Ernest S. Hanff ◽

Ian G. Campbell

Keyword(s):

Velocity Field ◽

Diffusion Flame

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The Coarse Scale Velocity

10.23943/princeton/9780691174822.003.0015 ◽

2017 ◽

Author(s):

Philip Isett

Keyword(s):

Velocity Field ◽

Building Blocks ◽

Coarse Scale ◽

Divergence Equation ◽

Higher Derivatives ◽

Order Of Magnitude ◽

Derivatives Of

This chapter deals with the coarse scale velocity. It begins the proof of Lemma (10.1) by choosing a double mollification for the velocity field. Here ∈ᵥ is taken to be as large as possible so that higher derivatives of velement are less costly, and each vsubscript Element has frequency smaller than λ‎ so elementv⁻¹ must be smaller than λ‎ in order of magnitude. Each derivative of vsubscript Element up to order L costs a factor of Ξ‎. The chapter proceeds by describing the basic building blocks of the construction, the choice of elementv and the parametrix expansion for the divergence equation.

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Finite difference code for velocity and surface traction of a Fluid between Two Eccentric Spheres

JOURNAL OF ADVANCES IN PHYSICS ◽

10.24297/jap.v11i1.6950 ◽

2015 ◽

Vol 11 (1) ◽

pp. 2960-2971

Author(s):

M.Abdel Wahab

Keyword(s):

Velocity Field ◽

Angular Velocity ◽

Finite Difference ◽

Numerical Study ◽

Outer Sphere ◽

Equation Of Motion ◽

Annular Region ◽

Surface Traction ◽

Angular Velocities ◽

Axis Passing

The Numerical study of the flow of a fluid in the annular region between two eccentric sphere susing PHP Code isinvestigated. This flow is created by considering the inner sphere to rotate with angular velocity 1 ï— and the outer sphererotate with angular velocity 2 ï— about the axis passing through their centers, the z-axis, using the three dimensionalBispherical coordinates (ï¡,ï¢ ,ïª) .The velocity field of fluid is determined by solving equation of motion using PHP Codeat different cases of angular velocities of inner and outer sphere. Also Finite difference code is used to calculate surfacetractions at outer sphere.

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