SELFE FAQ - Revision history

Yjzhang at 00:48, 16 September 2013

2013-09-16T00:48:31Z

Yjzhang at 17:52, 17 September 2012

2012-09-17T17:52:16Z

Yjzhang at 17:45, 17 September 2012

2012-09-17T17:45:43Z

Yjzhang: Blanked the page

2012-09-17T17:42:56Z

Blanked the page

Yjzhang at 17:41, 17 September 2012

2012-09-17T17:41:28Z

Yjzhang at 17:37, 17 September 2012

2012-09-17T17:37:07Z

Yjzhang: Created page with "The list of Q/A below applies to both serial and parallel versions.

How do I set up a vertical grid?
My results show platform/compiler/CPU dependency. ..."

2012-09-17T17:35:38Z

Created page with "The list of Q/A below applies to both serial and parallel versions. <UL> <LI>How do I set up a vertical grid? <LI>My results show platform/compiler/CPU dependency. ..."

New page

The list of Q/A below applies to both serial and parallel versions.

<UL>
<LI>How do I set up a vertical grid?
<LI>My results show platform/compiler/CPU dependency.
<LI>Run crashed with a fort.11 error message"QUICKSEARCH: no intersecting edge....".
<LI>How to do a tidal simulation with SELFE?
<LI>How do I make GOTM libraries?
<LI>How do I choose the flags in lqk.gr3?
<LI>My river and plume are too fresh.
<LI>I'd like to add some passive tracer transport to SELFE. How can I interface my own code to it?
<LI>How to impose river discharge if the depth is negative there?
<LI> How do I set up sflux/ using NARR (North America only) files in the Utility Library for atmospheric model (nws=2)?
<LI>How do I prepare my own netcdf files for atmospheric model (nws=2)?
<LI>My non-hydrostatic run blows up.
<LI> I have large velocity at open boundary
<LI>My run crashed; how can I find out why?
</UL>

@@ Line 13: / Line 13: @@
 The simplest way is to use SELFE 2D. If you have to use SELFE 3D, make sure the bottom boundary layer is reasonably resolved.
 <!--==I'd like to add some passive tracer transport to SELFE. How can I interface my own code to it?==
@@ Line 19: / Line 22: @@
 ==How do I prepare my own netcdf files for atmospheric model (nws=2)?==
 ==I have large velocity at open boundary==
-==My run crashed; how can I find out why? == -->
+-->

@@ Line 2: / Line 2: @@
 ==My results show platform/compiler/CPU dependency==
-==Run crashed with a fort.11 error message"QUICKSEARCH: no intersecting edge...."==
+Due to some intricate differences between different compilers/platforms some minor differences in results are expected. Bit-by-bit match of results using different numbers of CPUs is impossible also. But the differences should be small and should stablize over time iteration.
 ==How to do a tidal simulation with SELFE?==
-==How do I make GOTM libraries?==
-==My river and plume are too fresh==
+The simplest way is to use SELFE 2D. If you have to use SELFE 3D, make sure the bottom boundary layer is reasonably resolved.
 ==I'd like to add some passive tracer transport to SELFE. How can I interface my own code to it?==
 ==How to impose river discharge if the depth is negative there?==
 ==How do I set up sflux/ using NARR (North America only) files in the Utility Library for atmospheric model (nws=2)?==
 ==How do I prepare my own netcdf files for atmospheric model (nws=2)?==
 ==I have large velocity at open boundary==
-==My run crashed; how can I find out why? ==
+==My run crashed; how can I find out why? == -->

← Older revision	Revision as of 17:45, 17 September 2012
Line 1:	Line 1:

	+
	+	==My results show platform/compiler/CPU dependency==
	+	==Run crashed with a fort.11 error message"QUICKSEARCH: no intersecting edge...."==
	+	==How to do a tidal simulation with SELFE?==
	+	==How do I make GOTM libraries?==
	+	==My river and plume are too fresh==
	+	==I'd like to add some passive tracer transport to SELFE. How can I interface my own code to it?==
	+	==How to impose river discharge if the depth is negative there?==
	+	==How do I set up sflux/ using NARR (North America only) files in the Utility Library for atmospheric model (nws=2)?==
	+	==How do I prepare my own netcdf files for atmospheric model (nws=2)?==
	+	==I have large velocity at open boundary==
	+	==My run crashed; how can I find out why? ==

← Older revision		Revision as of 17:42, 17 September 2012
Line 1:		Line 1:
−	~~<OL>~~
−	~~<LI> <A "#anchorA" NAME="faq1" href="#faq1_2">How do I set up a vertical grid?</A>~~
−	~~<LI> <A "#anchorA" NAME="faq12" href="#faq12_2">My results show platform/compiler/CPU dependency.~~
−	~~<LI> <A "#anchorA" NAME="faq13" href="#faq13_2">Run crashed with a fort.11 error message"QUICKSEARCH: no intersecting edge....".~~
−	~~</A>~~
−	~~<LI> <A "#anchorA" NAME="faq10" href="#faq10_2">How to do a tidal simulation with SELFE?</A>~~
−	~~<LI> <A "#anchorA" NAME="faq5" href="#faq5_2">How do I make GOTM libraries?</A>~~
−	~~<LI> <A "#anchorA" NAME="faq2" href="#faq2_2">How do I choose the flags in lqk.gr3?</A>~~
−	~~<LI> <A "#anchorA" NAME="faq3" href="#faq3_2">My river and plume are too fresh.</A>~~
−	~~<LI> <A "#anchorA" NAME="faq4" href="#faq4_2">I'd like to add some passive tracer transport to SELFE. How can I interface my own code to it?</A>~~
−	~~<LI> <A "#anchorA" NAME="faq6" href="#faq6_2">How to impose river discharge if the depth is negative there?</A>~~
−	~~<LI> <A "#anchorA" NAME="faq8" href="#faq8_2"> How do I set up sflux/ using NARR (North America only) files in the~~
−	~~Utility Library for atmospheric model (nws=2)? </A>~~
−	~~<LI> <A "#anchorA" NAME="faq7" href="#faq7_2"> How do I prepare my own netcdf files for atmospheric model (nws=2)? </A>~~
−	~~<LI> <A "#anchorA" NAME="faq9" href="#faq9_2"> My non-hydrostatic run blows up. </A>~~
−	~~<LI> <A "#anchorA" NAME="faq14" href="#faq14_2"> I have large velocity at open boundary </A>~~
−	~~<LI> <A "#anchorA" NAME="faq15" href="#faq15_2"> My run crashed; how can I find out~~
−	~~why?</A>~~
−	~~</OL>~~
−	~~<HR>~~
−	~~<HR>~~

−	~~<HR>~~
−	~~<p> </p>~~
−
−	~~<p> <b><font color="#FF0000"><a name="faq1_2">How do I set up a vertical grid? </a></font></b></p>~~
−	~~<p> </p> You should set it up according to your application. The first question to ask is whether a "pure S" model is~~
−	~~sufficient for your problem. We found it's adequate for most problems (99.9%) except when strong stratification encounters~~
−	~~steep bottom slope (e.g., strongly stratified Columbia River plume flows over a shelf break~~
−	~~with slope in excess of 1/20). In the S part of vgrid.in, adjust the constants h_c, theta_b, theta_f to resolve appropriate~~
−	~~boundary layers. Note that h_c also determines the boundary between S-zone and sigma-zone (where traditional sigma-coordinates~~
−	~~are used becasue S-transformation is invalid when h &lt h_c).~~
−
−	~~If (in the unlikely case that) a SZ model is needed, h_s may be chosen as the max. depth of the shelf, and make sure there is~~
−	~~a smooth transition between S and Z coordinates. You can get a preview of some sample z-coordinates at various depths~~
−	~~by running the code with the pre-processor flag (ipre in param.in) turned on.~~
−
−	~~<p> <a href="#faq1">go back</a></p>~~

@@ Line 1: / Line 1: @@
-The list of Q/A below applies to both serial and parallel versions.
+<OL>
-<UL>
+<HR>
-     <LI>How do I set up a vertical grid?
+     <p> </p>
-    <LI>My results show platform/compiler/CPU dependency.
-    <LI>Run crashed with a fort.11 error message"QUICKSEARCH: no intersecting edge....".
+<p> <b><font color="#FF0000"><a name="faq1_2">How do I set up a vertical grid? </a></font></b></p>
-    <LI>How to do a tidal simulation with SELFE?
+     <p> </p> You should set it up according to your application. The first question to ask is whether a "pure S" model is
-    <LI>How do I make GOTM libraries?
+sufficient for your problem. We found it's adequate for most problems (99.9%) except when strong stratification encounters
-     <LI>My river and plume are too fresh
+ steep bottom slope (e.g., strongly stratified Columbia River plume flows over a shelf break
-    <LI>I'd like to add some passive tracer transport to SELFE. How can I interface my own code to it?
+  with slope in excess of 1/20). In the S part of vgrid.in, adjust the constants h_c, theta_b, theta_f to resolve appropriate
-    <LI>How to impose river discharge if the depth is negative there?
+ boundary layers. Note that h_c also determines the boundary between S-zone and sigma-zone (where traditional sigma-coordinates
-    <LI> How do I set up sflux/ using NARR (North America only) files in the Utility Library for atmospheric model (nws=2)?
+ are used becasue S-transformation is invalid when h &lt h_c).
-    <LI>How do I prepare my own netcdf files for atmospheric model (nws=2)?
-    <LI>My non-hydrostatic run blows up.
+If (in the unlikely case that) a SZ model is needed, h_s may be chosen as the max. depth of the shelf, and make sure there is
-    <LI> I have large velocity at open boundary
+ a smooth transition between S and Z coordinates. You can get a preview of some sample z-coordinates at various depths
-    <!--LI>My run crashed; how can I find out why? -->
+ by running the code with the pre-processor flag (ipre in param.in) turned on.
-</UL>