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Showing results 1 to 12 of 12 Search took 0.00 seconds. Search: Posts Made By: pierresandre

Forum: FLUENT September 10, 2010, 02:17

Replies: 24 Fluent natural ventilation pressure boundary condition Views: 14,813 Posted By pierresandre Hi Saif, Try looking for "natural" or... Hi Saif, Try looking for "natural" or "natural convection." This should do the trick.

Forum: FLUENT September 9, 2010, 03:06

Replies: 24 Fluent natural ventilation pressure boundary condition Views: 14,813 Posted By pierresandre Hi Saiful, There is not really a user manual... Hi Saiful, There is not really a user manual specifically for natural ventilation. Rather the user manual supplied with the product has specifications intended as best practices. So you will have...

Forum: FLUENT June 26, 2010, 05:30

Replies: 24 Fluent natural ventilation pressure boundary condition Views: 14,813 Posted By pierresandre Once you know that you have a pressure... Once you know that you have a pressure stratification you can use linear regression to determine the actual value of the pressure at the upper pressure boundary. Use this value instead of the zero...

Forum: FLUENT June 25, 2010, 11:16

Replies: 24 Fluent natural ventilation pressure boundary condition Views: 14,813 Posted By pierresandre Best way to check if you have pressure... Best way to check if you have pressure stratification is to make a vertical isoline outside the domain of interest, i.e. outside the main flow, and then plot pressure along that line. If you don't...

Forum: FLUENT June 25, 2010, 02:24

Replies: 24 Fluent natural ventilation pressure boundary condition Views: 14,813 Posted By pierresandre Hi, At the moment I am not working on CFD... Hi, At the moment I am not working on CFD simulations as other things are occupying my time. Did you check if you have a pressure stratification present in the medium?

Forum: FLUENT June 22, 2010, 04:06

Replies: 24 Fluent natural ventilation pressure boundary condition Views: 14,813 Posted By pierresandre Hi, Well, I to experimented with different... Hi, Well, I to experimented with different domain sizes but on a trial and error bases to see what happens. So I cannot help you much with that. However, I do know people who extended their domain...

Forum: FLUENT June 21, 2010, 11:54

Replies: 24 Fluent natural ventilation pressure boundary condition Views: 14,813 Posted By pierresandre Hi, My suggestion is first to check if you... Hi, My suggestion is first to check if you have a pressure stratification inside your domain, i.e. check if pressure is changing with hight. In principle it should not as both inlets and outlets...

Forum: FLUENT April 9, 2010, 03:37

Replies: 24 Fluent natural ventilation pressure boundary condition Views: 14,813 Posted By pierresandre I believe I did not explained myself well. I was... I believe I did not explained myself well. I was not referring to the original (gravity induced) pressure, rho*g*h, but to the residual pressure in the simulations. My simulations indicated that the...

Forum: FLUENT April 8, 2010, 11:50

Replies: 24 Fluent natural ventilation pressure boundary condition Views: 14,813 Posted By pierresandre In actual fact I don't know how the problem... In actual fact I don't know how the problem arises and I could not think of a way of investigating the issue. Regarding the sponge layer, this is obtained by creating a layer between the boundary...

Forum: FLUENT April 8, 2010, 03:38

Replies: 24 Fluent natural ventilation pressure boundary condition Views: 14,813 Posted By pierresandre Well back flow is a common issue with boundary... Well back flow is a common issue with boundary conditions and there are a number of ways to deal with this. One of them is to set up a "sponge layer" between the boundary and the domain of interest...

Forum: FLUENT April 6, 2010, 04:37

Replies: 24 Fluent natural ventilation pressure boundary condition Views: 14,813 Posted By pierresandre Hi, Thank you for your reply. However, I... Hi, Thank you for your reply. However, I believe I did not explain myself very well. In actual fact, from the user manual, Fluent uses the redefined pressure, p' = p - rho*g*h automatically...

Forum: FLUENT November 9, 2009, 07:51

Replies: 24 Fluent natural ventilation pressure boundary condition Views: 14,813 Posted By pierresandre Fluent natural ventilation pressure boundary condition Hi, I am modelling natural ventilation from a point source in an open space using Fluent with the Boussinesq approximation. The model includes pressure inlets at the bottom and at the sides and a...

Showing results 1 to 12 of 12

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