A manifold is the hub of a heating system, and distributes water throughout a home. It provides a central place to connect both your supply and return lines. Supply water from the heat source enters the manifold and circulates hot water throughout the system. They can be used in radiant, hydronic, or snow-melt applications. SupplyHouse.com offers the manifolds in different sizes ranging from 2 to 12 loops.

A heating manifold can be as simple as a copper unit with just supply and return ports with shut off valves for each. SupplyHouse.com also offers pre-assembled manifolds that come with some key accessories that you would normally buy separately.

Shut off valves, temperature gauges, bleeders, flow meters and drain valves may be included depending on the brand you choose. Bleeders are used to release any air from the system when it is first filled with water and drain valves allow you to drain the system if needed. Temperature gauges make it easy to monitor the water temperature in your system. Shut off valves are used to close off either the supply or return ports if a repair is needed. Flow valves are used to ensure the heat is evenly distributed throughout a system and the flow meters give a visual indication of the water flow in each loop.

Even when selecting a pre-assembled manifold, the accessories included vary by brand.

If you want to use your manifold to heat multiple zones, you can purchase return side actuators. The actuators act as zone valves to allow you to use one manifold to control the temperature in different rooms independently.

Heating manifolds generally require fittings with a specific thread made for that brand. You can not use standard pipe fittings found in stores.

Each manifold system has a variety of adapters, end caps, and fitting assemblies that can be purchased to customize the manifold for different applications. SupplyHouse.com offers the individual manifolds as well as manifold kits that include the required fittings.

Vidéo 1/4 sur la simulation numérique d’un écoulement électroosmotique en milieu poreux.

J’espère que ça vous aidera, et désolé pour la qualité de la vidéo et des explications, j’ai dû faire vite. Bon visionnage et bon courage pour votre travail !

Liens des tutoriaux pour Blender:

Code pour l’UDF dans Fluent:

#include “udf.h”
#include “models.h”

enum

PSI
;

real z = 1;
real F = 96485.33289; /*(C/mol) */
real R = 8.3144621 ; /* (J/mol*K) */
real T = 305; /* (K) */
real epsilon = 6.9*0.0000000001; /* (C/V*m) */
real Ex = 40000; /* (V/m) */
real c_0 = 7.5*0.001; /* (mol/m3) loin du mur */

real x[ND_ND];
real y;

Thread *t;

cell_t c;
face_t f;

DEFINE_SOURCE(axial_mom_source, c, t, dS, eqn)

float S_x;
dS[eqn] = 0;
S_x = -2*z*F*c_0*sinh(z*F*C_UDSI(c, t, 0)/(R*T))*Ex;
return S_x;

DEFINE_SOURCE(psi_source, c, t, dS, eqn)

float S_psi;
dS[eqn] = -2*pow(z,2)*pow(F,2)*c_0*cosh(z*F*C_UDSI(c,t,0)/(R*T))/(epsilon*R*T);
S_psi = -2*z*F*c_0*sinh(z*F*C_UDSI(c, t, 0)/(R*T))/epsilon;
return S_psi;

Sources:

Chen, C. H., & Santiago, J. G. (2002). A planar electroosmotic micropump. Microelectromechanical Systems, Journal of microelectromechanical systems.

Ren, Y., & Stein, D. (2008). Slip-enhanced electrokinetic energy conversion in nanofluidic channels. Nanotechnology.

Berrouche, Y. (2008). Etude théorique et expérimentale de pompes électro-osmotiques et de leur utilisation dans une boucle de refroidissement de l’électronique de puissance (Doctoral dissertation, Institut National Polytechnique de Grenoble-INPG).

Shamloo, A., Merdasi, A., & Vatankhah, P. (2016). Numerical Simulation of Heat Transfer in Mixed Electroosmotic Pressure-Driven Flow in Straight Microchannels. Journal of Thermal Science and Engineering Applications.

Kim, M. M. (2006). Computational Studies of Protein and Particle Transport in Membrane System (Doctoral dissertation, The Pennsylvania State University).

Young, J. M. (2005). Microparticle Influenced Electroosmotic Flow.

Xu, Z., Miao, J., Wang, N., Wen, W., & Sheng, P. (2011). Maximum efficiency of the electro-osmotic pump. Physical Review.

Devasenathipathy, S., & Santiago, J. G. (2005). Electrokinetic flow diagnostics. In Microscale Diagnostic Techniques (pp. 113-154). Springer Berlin Heidelberg.

Tenny, J. S. (2004). Numerical Simulations in Electro-osmotic Flow.

Wang, X., Cheng, C., Wang, S., & Liu, S. (2009). Electroosmotic pumps and their applications in microfluidic systems. Microfluidics and Nanofluidics.

Joseph, P. (2005). Etude expérimentale du glissement liquide-solide sur surfaces lisses et texturées (Doctoral dissertation, Université Pierre et Marie Curie-Paris VI).

Brask, A. (2005). Electroosmotic micropumps. PhD ThesisTechnical University of Denmark, Denmark.

Yao, S., & Santiago, J. G. (2003). Porous glass electroosmotic pumps: theory. Journal of Colloid and Interface Science, 268(1), 133-142.

Patel, V., & Kassegne, S. K. (2007). Electroosmosis and thermal effects in magnetohydrodynamic (MHD) micropumps using 3D MHD equations. Sensors and Actuators B: Chemical, 122(1), 42-52.

Pieritz, R. A. (1998). Modélisation et simulation de milieux poreux par réseaux topologiques (Doctoral dissertation, Université Joseph Fourier–Grenoble).

Kang, Y., Yang, C., & Huang, X. (2002). Dynamic aspects of electroosmotic flow in a cylindrical microcapillary. International Journal of Engineering Science, 40(20), 2203-2221.

Balli, M., Mahmed, C., Duc, D., Nikkola, P., Sari, O., Hadorn, J. C., & Rahali, F. (2012). Le renouveau de la réfrigération magnétique. Revue Générale du Froid, 102(1121), 45-54

Drake, D. G., & Abu-Sitta, A. M. (1966). Magnetohydrodynamic flow in a rectangular channel at high Hartmann number. Zeitschrift für angewandte Mathematik und Physik ZAMP, 17(4), 519-528.

Müller, U., & Bühler, L. (2002). Liquid Metal Magneto-Hydraulics Flows in Ducts and Cavities. In Magnetohydrodynamics (pp. 1-67). Springer Vienna.